Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/MessageCache.php on line 198

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/MessageCache.php on line 198

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/MessageCache.php on line 198

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/MessageCache.php on line 198

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/MessageCache.php on line 198

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/MessageCache.php on line 198

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/MessageCache.php on line 198

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/MessageCache.php on line 198

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/MessageCache.php on line 198

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/MessageCache.php on line 198

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2627

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/MessageCache.php on line 198

Deprecated: Constant E_STRICT is deprecated since 8.4, the error level was removed in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/exception/MWExceptionHandler.php on line 298

Deprecated: ord(): Providing a string that is not one byte long is deprecated. Use ord($str[0]) instead in /Library/WebServer/Sites/MediaWiki/mediawiki-1.43.0/includes/language/Language.php on line 2581

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https://qubits.korea.ac.kr/Qubits/index.php?action=history&feed=atom&title=Lee%2C_Donghun Lee, Donghun - Revision history 2025-12-18T05:20:23Z Revision history for this page on the wiki MediaWiki 1.43.0
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https://qubits.korea.ac.kr/Qubits/index.php?title=Lee,_Donghun&diff=424&oldid=prev Donghun: Redirected page to Quantum control of a single-spin quantum emitter in diamond via coupling with a mechanical oscillator 2019-03-01T05:40:06Z <p>Redirected page to <a href="/Qubits/index.php/Quantum_control_of_a_single-spin_quantum_emitter_in_diamond_via_coupling_with_a_mechanical_oscillator" title="Quantum control of a single-spin quantum emitter in diamond via coupling with a mechanical oscillator">Quantum control of a single-spin quantum emitter in diamond via coupling with a mechanical oscillator</a></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 05:40, 1 March 2019</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* Speaker: Lee, Donghun (Korea Univ., Korea)</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">#redirect[[Quantum control of a single-spin quantum emitter in diamond via coupling with a mechanical oscillator]]</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Qubits2019<ins style="font-weight: bold; text-decoration: none;">]]MRI</ins>]]</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">There has been rapidly growing interest in hybrid quantum devices involving a solid-state spin and a macroscopic mechanical oscillator. Such hybrid devices create exciting opportunities to mediate interactions between disparate qubits and to explore the quantum regime of macroscopic mechanical objects. In particular, a system consisting of the nitrogen-vacancy defect center in diamond embedded inside a high quality factor diamond mechanical oscillator is an appealing candidate for such a hybrid quantum device, as it combines the highly coherent and versatile spin properties of the defect center with the excellent mechanical properties of diamond resonators. In this talk, we will present recent experimental progress on diamond-based hybrid quantum devices in which the defect’s spin and orbital dynamics are mechanically driven by the motion of a mechanical oscillator. We will discuss the potential usage of multiple mechanical modes to fully engineer the strain environment of the defect center. For instance, simultaneous motion of flexural and torsional modes in T-shaped diamond cantilever can provide selective controls of linear and shear strain terms. We will also discuss future prospective applications, including strain-assisted indistinguishable photon generation, long range, phonon-mediated spin-spin interactions and phonon cooling and lasing in the quantum regime.</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Qubits2019]]</div></td><td colspan="2" class="diff-side-added"></td></tr> </table> Donghun
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https://qubits.korea.ac.kr/Qubits/index.php?title=Lee,_Donghun&diff=423&oldid=prev Donghun at 05:38, 1 March 2019 2019-03-01T05:38:24Z <p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 05:38, 1 March 2019</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* Speaker: <del style="font-weight: bold; text-decoration: none;">Choi</del>, <del style="font-weight: bold; text-decoration: none;">Soonwon </del>(<del style="font-weight: bold; text-decoration: none;">UC Berkeley</del>, <del style="font-weight: bold; text-decoration: none;">USA</del>)</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* Speaker: <ins style="font-weight: bold; text-decoration: none;">Lee</ins>, <ins style="font-weight: bold; text-decoration: none;">Donghun </ins>(<ins style="font-weight: bold; text-decoration: none;">Korea Univ.</ins>, <ins style="font-weight: bold; text-decoration: none;">Korea</ins>)</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">Strongly interacting </del>solid-state spin <del style="font-weight: bold; text-decoration: none;">ensembles provide </del>a <del style="font-weight: bold; text-decoration: none;">promising platform </del>to explore quantum <del style="font-weight: bold; text-decoration: none;">many-body physics</del>. In particular, <del style="font-weight: bold; text-decoration: none;">Nitrogen</del>-<del style="font-weight: bold; text-decoration: none;">Vacancy (NV) centers </del>in diamond <del style="font-weight: bold; text-decoration: none;">are </del>appealing as <del style="font-weight: bold; text-decoration: none;">they exhibit </del>excellent <del style="font-weight: bold; text-decoration: none;">spin </del>properties <del style="font-weight: bold; text-decoration: none;">even at room temperature</del>. In this talk, <del style="font-weight: bold; text-decoration: none;">I </del>will present <del style="font-weight: bold; text-decoration: none;">how a high-density NV ensemble can be used to investigate out</del>-of<del style="font-weight: bold; text-decoration: none;">-equilibrium quantum many-body phenomena</del>. <del style="font-weight: bold; text-decoration: none;">In particular, I </del>will discuss the <del style="font-weight: bold; text-decoration: none;">recent experimental observation </del>of <del style="font-weight: bold; text-decoration: none;">discrete time-crystalline (DTC) order: a nonequilibrium order characterized by a spontaneous breaking </del>of <del style="font-weight: bold; text-decoration: none;">time-translational symmetry </del>and <del style="font-weight: bold; text-decoration: none;">manifested </del>in <del style="font-weight: bold; text-decoration: none;">robust, long</del>-<del style="font-weight: bold; text-decoration: none;">lived subharmonic responses of a periodically driven system [1]. By engineering different types of effective interactions, we find that the spin ensemble </del>can <del style="font-weight: bold; text-decoration: none;">exhibit a long-lived robust subharmonic response over a wide range </del>of <del style="font-weight: bold; text-decoration: none;">parameters</del>. <del style="font-weight: bold; text-decoration: none;">Additional systematic investigation of the lifetime of the DTC response reveals three different regimes of relaxation dynamics</del>, <del style="font-weight: bold; text-decoration: none;">that can be continuously varied from disorder</del>-<del style="font-weight: bold; text-decoration: none;">induced slow thermalization</del>, <del style="font-weight: bold; text-decoration: none;">to driving assisted relaxation</del>, <del style="font-weight: bold; text-decoration: none;">and ultimately to universal Markovian dynamics [2]. These results highlight the utility of high</del>-<del style="font-weight: bold; text-decoration: none;">density NV ensembles as a probe of many</del>-<del style="font-weight: bold; text-decoration: none;">body dynamics </del>and <del style="font-weight: bold; text-decoration: none;">thermalization, an important aspect </del>in the <del style="font-weight: bold; text-decoration: none;">quest for the understanding and control of quantum matter, and may enable novel applications in quantum simulation and metrology with strongly correlated </del>quantum <del style="font-weight: bold; text-decoration: none;">matter [3]</del>.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">There has been rapidly growing interest in hybrid quantum devices involving a </ins>solid-state spin <ins style="font-weight: bold; text-decoration: none;">and </ins>a <ins style="font-weight: bold; text-decoration: none;">macroscopic mechanical oscillator. Such hybrid devices create exciting opportunities to mediate interactions between disparate qubits and </ins>to explore <ins style="font-weight: bold; text-decoration: none;">the </ins>quantum <ins style="font-weight: bold; text-decoration: none;">regime of macroscopic mechanical objects</ins>. In particular, <ins style="font-weight: bold; text-decoration: none;">a system consisting of the nitrogen</ins>-<ins style="font-weight: bold; text-decoration: none;">vacancy defect center </ins>in diamond <ins style="font-weight: bold; text-decoration: none;">embedded inside a high quality factor diamond mechanical oscillator is an </ins>appealing <ins style="font-weight: bold; text-decoration: none;">candidate for such a hybrid quantum device, </ins>as <ins style="font-weight: bold; text-decoration: none;">it combines the highly coherent and versatile spin properties of the defect center with the </ins>excellent <ins style="font-weight: bold; text-decoration: none;">mechanical </ins>properties <ins style="font-weight: bold; text-decoration: none;">of diamond resonators</ins>. In this talk, <ins style="font-weight: bold; text-decoration: none;">we </ins>will present <ins style="font-weight: bold; text-decoration: none;">recent experimental progress on diamond</ins>-<ins style="font-weight: bold; text-decoration: none;">based hybrid quantum devices in which the defect’s spin and orbital dynamics are mechanically driven by the motion </ins>of <ins style="font-weight: bold; text-decoration: none;">a mechanical oscillator</ins>. <ins style="font-weight: bold; text-decoration: none;">We </ins>will discuss the <ins style="font-weight: bold; text-decoration: none;">potential usage of multiple mechanical modes to fully engineer the strain environment </ins>of <ins style="font-weight: bold; text-decoration: none;">the defect center. For instance, simultaneous motion </ins>of <ins style="font-weight: bold; text-decoration: none;">flexural </ins>and <ins style="font-weight: bold; text-decoration: none;">torsional modes </ins>in <ins style="font-weight: bold; text-decoration: none;">T</ins>-<ins style="font-weight: bold; text-decoration: none;">shaped diamond cantilever </ins>can <ins style="font-weight: bold; text-decoration: none;">provide selective controls </ins>of <ins style="font-weight: bold; text-decoration: none;">linear and shear strain terms</ins>. <ins style="font-weight: bold; text-decoration: none;">We will also discuss future prospective applications</ins>, <ins style="font-weight: bold; text-decoration: none;">including strain</ins>-<ins style="font-weight: bold; text-decoration: none;">assisted indistinguishable photon generation</ins>, <ins style="font-weight: bold; text-decoration: none;">long range</ins>, <ins style="font-weight: bold; text-decoration: none;">phonon</ins>-<ins style="font-weight: bold; text-decoration: none;">mediated spin</ins>-<ins style="font-weight: bold; text-decoration: none;">spin interactions and phonon cooling </ins>and <ins style="font-weight: bold; text-decoration: none;">lasing </ins>in the quantum <ins style="font-weight: bold; text-decoration: none;">regime</ins>.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[1] S. Choi et al, Nature 543, 221–225 (2017)</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[2] J. Choi et al, Phys. Rev. Lett. 122, 043603 (2019)</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[3] S. Choi et al, arXiv:1801.00042 (2018)</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Qubits2019]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Qubits2019]]</div></td></tr> </table> Donghun
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https://qubits.korea.ac.kr/Qubits/index.php?title=Lee,_Donghun&diff=421&oldid=prev Donghun at 05:33, 1 March 2019 2019-03-01T05:33:12Z <p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 05:33, 1 March 2019</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">Professor of Physics</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* Speaker: Choi, Soonwon (UC Berkeley, USA)</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Category:<del style="font-weight: bold; text-decoration: none;">Members</del>]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Strongly interacting solid-state spin ensembles provide a promising platform to explore quantum many-body physics. In particular, Nitrogen-Vacancy (NV) centers in diamond are appealing as they exhibit excellent spin properties even at room temperature. In this talk, I will present how a high-density NV ensemble can be used to investigate out-of-equilibrium quantum many-body phenomena. In particular, I will discuss the recent experimental observation of discrete time-crystalline (DTC) order: a nonequilibrium order characterized by a spontaneous breaking of time-translational symmetry and manifested in robust, long-lived subharmonic responses of a periodically driven system [1]. By engineering different types of effective interactions, we find that the spin ensemble can exhibit a long-lived robust subharmonic response over a wide range of parameters. Additional systematic investigation of the lifetime of the DTC response reveals three different regimes of relaxation dynamics, that can be continuously varied from disorder-induced slow thermalization, to driving assisted relaxation, and ultimately to universal Markovian dynamics [2]. These results highlight the utility of high-density NV ensembles as a probe of many-body dynamics and thermalization, an important aspect in the quest for the understanding and control of quantum matter, and may enable novel applications in quantum simulation and metrology with strongly correlated quantum matter [3].</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[1] S. Choi et al, Nature 543, 221–225 (2017)</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[2] J. Choi et al, Phys. Rev. Lett. 122, 043603 (2019)</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[3] S. Choi et al, arXiv:1801.00042 (2018)</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Category:<ins style="font-weight: bold; text-decoration: none;">Qubits2019</ins>]]</div></td></tr> </table> Donghun
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https://qubits.korea.ac.kr/Qubits/index.php?title=Lee,_Donghun&diff=107&oldid=prev Mahnsoo.choi: Created page with "Professor of Physics Category:Members" 2018-11-26T08:11:37Z <p>Created page with &quot;Professor of Physics <a href="/Qubits/index.php/Category:Members" title="Category:Members">Category:Members</a>&quot;</p> <p><b>New page</b></p><div>Professor of Physics<br /> <br /> [[Category:Members]]</div> Mahnsoo.choi