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arXiv quant-ph/0309177quant-ph
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量子信息压缩的几何解释

Towards a geometrical interpretation of quantum information compression

Graeme Mitchison, Richard Jozsa

摘要:

设S为有限纯量子态系综E的冯诺伊曼熵。我们表明,S可以自然地被视为一组几何体积的函数在希尔伯特空间中定义的状态和S是单调增加的,在这些变量中的每一个。由于S是E的Schumacher压缩极限,这种单调性性质表明压缩过程中涉及的量子冗余的几何解释。它提供了澄清以前的工作中,它表明,S可能会增加,同时增加重叠的每对状态的合奏。作为一个副产品,我们的数学技术也提供了一个新的解释的亚熵的E。

英文摘要:

Let S be the von Neumann entropy of a finite ensemble E of pure quantum states. We show that S may be naturally viewed as a function of a set of geometrical volumes in Hilbert space defined by the states and that S is monotonically increasing in each of these variables. Since S is the Schumacher compression limit of E, this monotonicity property suggests a geometrical interpretation of the quantum redundancy involved in the compression process. It provides clarification of previous work in which it was shown that S may be increased while increasing the overlap of each pair of states in the ensemble. As a byproduct, our mathematical techniques also provide a new interpretation of the subentropy of E.

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