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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Unital map ： ウィキペディア英語版 Unital map In abstract algebra, a unital map on a C *-algebra is a map $\backslash phi$ which preserves the identity element: :$\backslash phi\; (\; I\; )\; =\; I.\; \backslash ,$ This condition appears often in the context of completely positive maps, especially when they represent quantum operations. If $\backslash phi$ is completely positive, it can always be represented as :$\backslash phi\; (\; \backslash rho\; )\; =\; \backslash sum\_i\; E\_i\; \backslash rho\; E\_i^\backslash dagger.\; \backslash ,$ (The $E\_i$ are the Kraus operators associated with $\backslash phi$). In this case, the unital condition can be expressed as :$\backslash sum\_i\; E\_i\; E\_i\; ^\backslash dagger=\; I.\; \backslash ,$ 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Unital map」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.