{"published":"2022-05-03 01:56:51","type":"rich","version":"1.0","blog_url":"https://randommemory.hatenablog.com/","provider_name":"Hatena Blog","blog_title":"\u3089\u3093\u3060\u3080\u306a\u8a18\u61b6","categories":["quantum_computing"],"author_url":"https://blog.hatena.ne.jp/derwind/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frandommemory.hatenablog.com%2Fentry%2F2022%2F05%2F03%2F015651\" title=\" &lt;QT&gt; Digression: Measuring in Different Bases - \u3089\u3093\u3060\u3080\u306a\u8a18\u61b6\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","title":" <QT> Digression: Measuring in Different Bases","url":"https://randommemory.hatenablog.com/entry/2022/05/03/015651","author_name":"derwind","provider_url":"https://hatena.blog","description":"\u3044\u307e\u3044\u3061\u4f55\u3092\u66f8\u3044\u3066\u3042\u308b\u306e\u304b\u306f\u3088\u304f\u5206\u304b\u3089\u306a\u3044\u306e\u3067\u3001\u51e6\u7406\u3092\u305d\u306e\u307e\u307e\u8ffd\u3044\u304b\u3051\u3066\u307f\u3088\u3046\u3002$$ \\begin{align*} \\ket{q} = a \\ket{0} + b \\ket{1} = a^\\prime \\ket{+} + b^\\prime \\ket{-} \\end{align*} $$\u3068\u3044\u3046\u3088\u3046\u306b\u91cf\u5b50\u72b6\u614b\u306f\u8907\u6570\u306e\u6b63\u898f\u76f4\u4ea4\u57fa\u5e95\u3067\u6e2c\u5b9a\u3067\u304d\u308b\u3002\u4f8b\u3048\u3070\u3001X-\u57fa\u5e95 $\\ket{+}$ \u3068 $\\ket{-}$ \u3067 $\\ket{q}$ \u3092\u6e2c\u5b9a\u3059\u308b\u5834\u5408\u3001$p(\\ket{+}) = |a^\\prime|^2 = |\\braket{+|q}|^2$ \u3068\u306a\u308b\u3002$$ \\begin{align*} H \\ket{-} \u2026","width":"100%","image_url":null}