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href=\"https:\/\/quantumsea.net\/wp-content\/uploads\/2026\/10\/qs-product-fidelity-local-global-20261022-figure-8a15df6342d7.png\"><img decoding=\"async\" src=\"https:\/\/quantumsea.net\/wp-content\/uploads\/2026\/10\/qs-product-fidelity-local-global-20261022-figure-8a15df6342d7.png\" style=\"max-width:100%;height:auto\" 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Watrous, <a href=\"https:\/\/cs.uwaterloo.ca\/~watrous\/TQI\/TQI.double.3.pdf\">The Theory of Quantum Information, Chapter 3: Similarity and distance among states and channels<\/a>\uff082018\uff09\u3001\u547d\u984c3.13\u30fb\u5f0f3.81\uff08\u7d14\u7c8b\u72b6\u614b\u306e\u5fe0\u5b9f\u5ea6\uff09\u3001\u547d\u984c3.16\u30fb\u5f0f3.90\u20133.91\uff08\u30c6\u30f3\u30bd\u30eb\u7a4d\u306b\u5bfe\u3059\u308b\u4e57\u6cd5\u6027\uff09\u3001\u5370\u5237\u30da\u30fc\u30b8142\u2013143\u3002<a href=\"https:\/\/cs.uwaterloo.ca\/~watrous\/TQI\/\">\u8457\u8005\u306e\u66f8\u7c4d\u6848\u5185<\/a>\u3002\u6570\u5024\u4f8b\u3001\u30d9\u30eb\u72b6\u614b\u306e\u90e8\u5206\u30c8\u30ec\u30fc\u30b9\u3068X\u76f8\u95a2\u3001\u6bd4\u8f03\u56f3\u306f\u3001\u672c\u7a3f\u3067\u660e\u793a\u3057\u305f\u7406\u60f3\u72b6\u614b\u304b\u3089\u306e\u72ec\u81ea\u8a08\u7b97\u3067\u3059\u3002<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3064\u305a\u3064\u8abf\u3079\u308b\u3068\u3001\u3069\u306e\u91cf\u5b50\u30d3\u30c3\u30c8\u3082\u76ee\u6a19\u306b\u8fd1\u3044\u3002\u305d\u308c\u306a\u3089\u3001\u591a\u6570\u3092\u5408\u308f\u305b\u305f\u5168\u4f53\u3082\u540c\u3058\u304f\u3089\u3044\u8fd1\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u91cf\u5b50\u72b6\u614b\u306e\u8fd1\u3055\u3092\u8868\u3059\u5fe0\u5b9f\u5ea6\u3067\u306f\u3001\u90e8\u5206\u3054\u3068\u306e\u5024\u3068\u3001\u5168\u4f53\u306b\u3064\u3044\u3066\u306e\u5024\u3092\u5206\u3051\u3066\u8aad\u3080\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5404\u90e8\u5206\u306e\u5c0f\u3055\u306a\u9055\u3044\u304c\u7a4d\u307f [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1251,"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-1253","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-product-fidelity-local-global-20261022-featured-11a02616da55.png","_links":{"self":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1253","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=1253"}],"version-history":[{"count":1,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1253\/revisions"}],"predecessor-version":[{"id":1254,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1253\/revisions\/1254"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/media\/1251"}],"wp:attachment":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1253"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1253"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}