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Schmidt decomposition : ウィキペディア英語版 | Schmidt decomposition In linear algebra, the Schmidt decomposition (named after its originator Erhard Schmidt) refers to a particular way of expressing a vector in the tensor product of two inner product spaces. It has numerous applications in quantum information theory, for example in entanglement characterization and in state purification, and plasticity. ==Theorem== Let and be Hilbert spaces of dimensions ''n'' and ''m'' respectively. Assume . For any vector in the tensor product , there exist orthonormal sets and such that , where the scalars are real, non-negative, and, as a set, uniquely determined by .
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「Schmidt decomposition」の詳細全文を読む
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