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x\u306f\u3053\u306e\u6e96\u5099\u30e2\u30c7\u30eb\u306e\u6df7\u5408\u306e\u91cd\u307f\u3067\u3042\u308a\u3001\u5b9f\u6a5f\u306e\u30a8\u30e9\u30fc\u7387\u3092\u305d\u306e\u307e\u307e\u4ee3\u5165\u3067\u304d\u308b\u91cf\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u306e\u884c\u5217\u3092A\u306b\u3064\u3044\u3066\u90e8\u5206\u8ee2\u7f6e\u3059\u308b\u3068\u3001\u56db\u3064\u306e\u56fa\u6709\u5024\u306f\u3001<code>(1\uff0bx)\/4<\/code>\u304c\u4e09\u3064\u3068\u3001<code>(1\u22123x)\/4<\/code>\u304c\u4e00\u3064\u306b\u306a\u308a\u307e\u3059\u3002\u524d\u8005\u306f\u3053\u306e\u7bc4\u56f2\u3067\u8ca0\u306b\u306a\u308a\u307e\u305b\u3093\u3002\u5f8c\u8005\u304c0\u3092\u4e0b\u56de\u308b\u306e\u306f\u3001<strong>x\u304c1\/3\u3092\u8d85\u3048\u308b\u3068\u304d<\/strong>\u3067\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u305d\u306e\u7bc4\u56f2\u3067\u306f\u3053\u306e\u691c\u67fb\u3060\u3051\u3067\u3001\u72b6\u614b\u306b\u3082\u3064\u308c\u304c\u3042\u308b\u3068\u8a00\u3048\u307e\u3059\u3002<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/quantumsea.net\/wp-content\/uploads\/2026\/10\/qs-partial-transpose-entanglement-20261022-figure-7974b7f38170.png\" alt=\"\u4e00\u91cd\u9805\u306e\u91cd\u307fx\u304c\u5897\u3048\u308b\u3068\u3001\u90e8\u5206\u8ee2\u7f6e\u306e\u6700\u5c0f\u56fa\u6709\u5024\u306f4\u5206\u306e1\u304b\u3089\u30de\u30a4\u30ca\u30b92\u5206\u306e1\u3078\u76f4\u7dda\u7684\u306b\u6e1b\u308a\u3001x\u304c3\u5206\u306e1\u306e\u70b9\u30670\u3092\u6a2a\u5207\u308b\u3002\" style=\"max-width:100%;height:auto\"\/><figcaption>\u6307\u5b9a\u3057\u305f\u6df7\u5408\u30e2\u30c7\u30eb\u306e\u6700\u5c0f\u56fa\u6709\u5024\u3092\u72ec\u81ea\u8a08\u7b97\u30020\u672a\u6e80\u306f\u3082\u3064\u308c\u3092\u793a\u3059\u9818\u57df\u3067\u3059\u3002\u5b9f\u6a5f\u306e\u96d1\u97f3\u7279\u6027\u3084\u6e2c\u5b9a\u7d50\u679c\u3092\u8868\u3059\u56f3\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/figcaption><\/figure>\n<p>x\uff1d0\u306a\u3089\u3001\u56db\u3064\u306e\u56fa\u6709\u5024\u306f\u3059\u3079\u30661\/4\u3067\u3059\u3002x\uff1d1\/2\u306a\u3089\u3001\u4e09\u3064\u304c3\/8\u3001\u6b8b\u308a\u304c\u22121\/8\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u72b6\u614b\u306f\u534a\u5206\u306e\u5b8c\u5168\u6df7\u5408\u6210\u5206\u3092\u542b\u3093\u3067\u3044\u3066\u3082\u3001\u8ca0\u306e\u56fa\u6709\u5024\u306b\u3088\u3063\u3066\u3082\u3064\u308c\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u300c\u6df7\u5408\u72b6\u614b\u306b\u306a\u3063\u305f\u3089\u3001\u3082\u3064\u308c\u304c\u3059\u3079\u3066\u306a\u304f\u306a\u308b\u300d\u3068\u3044\u3046\u8aad\u307f\u65b9\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>\u5883\u754cx\uff1d1\/3\u3067\u306f\u3001\u6700\u5c0f\u56fa\u6709\u5024\u306f\u6b63\u78ba\u306b0\u3067\u3059\u30020\u306f\u8ca0\u306e\u5024\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u6d6e\u52d5\u5c0f\u6570\u70b9\u8a08\u7b97\u3067\u3054\u304f\u5c0f\u3055\u306a\u8ca0\u6570\u304c\u51fa\u305f\u3068\u3057\u3066\u3082\u3001\u4e38\u3081\u8aa4\u5dee\u306a\u306e\u304b\u3001\u5165\u529b\u306e\u63a8\u5b9a\u8aa4\u5dee\u306a\u306e\u304b\u3092\u78ba\u304b\u3081\u305a\u306b\u691c\u51fa\u3068\u6570\u3048\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u672c\u7a3f\u306e\u5024\u306f\u3001\u5b9a\u7fa9\u3057\u305f\u7406\u60f3\u884c\u5217\u3092\u8a08\u7b97\u3057\u305f\u3082\u306e\u3067\u3001\u672a\u77e5\u306e\u88c5\u7f6e\u304b\u3089\u72b6\u614b\u3092\u63a8\u5b9a\u3057\u305f\u7d50\u679c\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h2>\u691c\u51fa\u3067\u304d\u305f\u5834\u5408\u3068\u3001\u691c\u51fa\u3067\u304d\u306a\u304b\u3063\u305f\u5834\u5408<\/h2>\n<p>\u90e8\u5206\u8ee2\u7f6e\u5f8c\u306e\u884c\u5217\u304c\u6b63\u534a\u5b9a\u5024\u3067\u3042\u308b\u6027\u8cea\u3092\u3001PPT\uff08positive partial transpose\uff09\u3068\u547c\u3073\u307e\u3059\u3002\u3053\u306e\u6027\u8cea\u3092\u6e80\u305f\u3055\u306a\u3051\u308c\u3070\u3001\u3082\u3064\u308c\u3092\u691c\u51fa\u3067\u304d\u307e\u3059\u3002\u4e00\u65b9\u3001\u6e80\u305f\u3057\u305f\u5834\u5408\u306b\u5206\u96e2\u53ef\u80fd\u3060\u3068\u307e\u3067\u8a00\u3048\u308b\u304b\u306f\u3001\u7cfb\u306e\u6b21\u5143\u306a\u3069\u3001\u9069\u7528\u3059\u308b\u5b9a\u7406\u306e\u6761\u4ef6\u306b\u3088\u308a\u307e\u3059\u3002\u9ad8\u3044\u6b21\u5143\u306e\u7cfb\u3078\u3001\u4e8c\u91cf\u5b50\u30d3\u30c3\u30c8\u306b\u3064\u3044\u3066\u306e\u7d50\u8ad6\u3092\u305d\u306e\u307e\u307e\u5e83\u3052\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002[1\u30014\u30da\u30fc\u30b8]<\/p>\n<p>\u672c\u7a3f\u306f\u3001\u4e00\u822c\u306e\u6b21\u5143\u306b\u3064\u3044\u3066PPT\u3060\u3051\u3067\u5206\u96e2\u53ef\u80fd\u6027\u3092\u78ba\u5b9a\u3059\u308b\u65b9\u6cd5\u3092\u4e0e\u3048\u3066\u3044\u307e\u305b\u3093\u3002\u8ca0\u306e\u5024\u304c\u51fa\u306a\u3044\u5834\u5408\u306f\u3001\u307e\u305a\u300c\u3053\u306e\u691c\u67fb\u3067\u306f\u3082\u3064\u308c\u3092\u691c\u51fa\u3057\u306a\u304b\u3063\u305f\u300d\u3068\u533a\u5225\u3057\u3066\u8a18\u9332\u3057\u307e\u3059\u3002\u5fc5\u8981\u306a\u3089\u3001\u5bfe\u8c61\u306e\u6b21\u5143\u306b\u5bfe\u5fdc\u3059\u308b\u5b9a\u7406\u3084\u3001\u5225\u306e\u691c\u51fa\u65b9\u6cd5\u3092\u78ba\u304b\u3081\u307e\u3059\u3002<\/p>\n<p>\u5b9f\u9a13\u304b\u3089\u5bc6\u5ea6\u884c\u5217\u3092\u63a8\u5b9a\u3057\u3066\u4f7f\u3046\u5834\u5408\u306f\u3001\u5165\u529b\u884c\u5217\u304c\u30a8\u30eb\u30df\u30fc\u30c8\u3067\u30c8\u30ec\u30fc\u30b91\u304b\u3001\u5143\u306e\u72b6\u614b\u3068\u3057\u3066\u6b63\u534a\u5b9a\u5024\u304b\u3001\u63a8\u5b9a\u306e\u4e0d\u78ba\u304b\u3055\u304c\u3069\u308c\u307b\u3069\u304b\u3082\u95a2\u4fc2\u3057\u307e\u3059\u3002\u56fa\u6709\u5024\u306e\u5c0f\u6570\u70b9\u4ee5\u4e0b\u3092\u591a\u304f\u8868\u793a\u3059\u308b\u3053\u3068\u306f\u3001\u6e2c\u5b9a\u306e\u7cbe\u5ea6\u3092\u9ad8\u3081\u308b\u3053\u3068\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u8ca0\u306e\u6700\u5c0f\u5024\u306e\u5927\u304d\u3055\u3068\u3001\u4e0d\u78ba\u304b\u3055\u306e\u8a55\u4fa1\u3092\u5206\u3051\u3066\u793a\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u90e8\u5206\u8ee2\u7f6e\u306e\u5224\u5b9a\u3092\u4f7f\u3046\u3068\u304d\u306f\u3001\u72b6\u614b\u3092\u3069\u3046\u5206\u5272\u3057\u305f\u304b\u3001\u6dfb\u5b57\u3092\u3069\u3046\u4e26\u3079\u305f\u304b\u3001\u4f55\u306e\u4eee\u5b9a\u3067\u5bc6\u5ea6\u884c\u5217\u304c\u5f97\u3089\u308c\u305f\u304b\u3001\u8ca0\u306e\u5024\u304c\u8aa4\u5dee\u3092\u8d85\u3048\u3066\u3044\u308b\u304b\u3092\u305d\u308d\u3048\u307e\u3059\u3002\u4e0e\u3048\u3089\u308c\u305f\u72b6\u614b\u306e\u3082\u3064\u308c\u3092\u691c\u67fb\u3059\u308b\u554f\u3044\u3068\u3001\u305d\u306e\u8a08\u7b97\u3092\u7269\u7406\u7684\u306a\u64cd\u4f5c\u3068\u3057\u3066\u5b9f\u884c\u3067\u304d\u308b\u304b\u3068\u3044\u3046\u554f\u3044\u3092\u5206\u3051\u308b\u3068\u3001\u7d50\u679c\u3092\u904e\u5927\u306b\u8aad\u307e\u305a\u306b\u4f7f\u3048\u307e\u3059\u3002<\/p>\n<h2>\u51fa\u5178<\/h2>\n<ul>\n<li>[1] Asher Peres, <a href=\"https:\/\/arxiv.org\/abs\/quant-ph\/9604005v2\">Separability Criterion for Density Matrices<\/a>, arXiv:quant-ph\/9604005v2\uff081996\u5e746\u670817\u65e5\u7248\uff09\u3001Physical Review Letters 77, 1413\u20131415\u3002\u5f0f1\u30fb3\u30fb6\u20138\u30013\u20134\u30da\u30fc\u30b8\u3002\u5206\u96e2\u53ef\u80fd\u6027\u306e\u5fc5\u8981\u6761\u4ef6\u3068\u3001\u6307\u5b9a\u3057\u305f\u6df7\u5408\u72b6\u614b\u306e\u56fa\u6709\u5024\u3092\u53c2\u7167\u3002\u539f\u8ad6\u6587\u306e\u7570\u306a\u308b\u6b21\u5143\u306b\u3064\u3044\u3066\u306e\u6ce8\u610f\u3068\u533a\u5225\u3057\u3001\u672c\u7a3f\u306e\u56f3\u30fb\u4e94\u3064\u306e\u6df7\u5408\u7387\u30fb\u8907\u7d20\u7a4d\u72b6\u614b\u306e\u6dfb\u5b57\u691c\u67fb\u306f\u72ec\u81ea\u8a08\u7b97\u3067\u3059\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u96d1\u97f3\u304c\u6df7\u3058\u3063\u305f\u4e8c\u3064\u306e\u91cf\u5b50\u30d3\u30c3\u30c8\u306e\u72b6\u614b\u306b\u3064\u3044\u3066\u3001\u300c\u307e\u3060\u91cf\u5b50\u3082\u3064\u308c\u304c\u6b8b\u3063\u3066\u3044\u308b\u306e\u304b\u300d\u3092\u77e5\u308a\u305f\u3044\u3002\u76f8\u95a2\u304c\u5f31\u304f\u306a\u3063\u305f\u3068\u3044\u3046\u898b\u305f\u76ee\u3060\u3051\u3067\u306f\u3001\u305d\u306e\u7b54\u3048\u306f\u6c7a\u307e\u308a\u307e\u305b\u3093\u3002\u6df7\u5408\u72b6\u614b\u306b\u306f\u3001\u3082\u3064\u308c\u3092\u4f7f\u308f\u305a\u306b\u6e96\u5099\u3067\u304d\u308b\u3082\u306e\u3068\u3001\u305d\u3046\u3057\u305f\u6e96\u5099\u3067\u306f\u8868 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1201,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":false,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[30],"tags":[184],"class_list":["post-1203","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-computing","tag-quantum-computers"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/quantumsea.net\/wp-content\/uploads\/2026\/10\/qs-partial-transpose-entanglement-20261022-featured-e7bf45e69899.png","_links":{"self":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1203","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1203"}],"version-history":[{"count":1,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1203\/revisions"}],"predecessor-version":[{"id":1206,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1203\/revisions\/1206"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/media\/1201"}],"wp:attachment":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1203"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1203"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1203"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}