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arXiv quant-ph/0109060quant-ph
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量子运算、态变换和概率

Quantum Operations, State Transformations and Probabilities

Anthony Chefles

摘要:

在量子运算中,概率既表示状态转换的成功程度,又表示最终状态的混合程度(作为密度算符本征值)。我们给出了一个统一的治疗纯到纯的状态转换,包括概率和确定性的情况下。然后,我们讨论的作用,在描述量子操作中的混合动力学的优势。导出了所有初态混合增强的条件。我们发现,混合是单调递减的确定性纯到纯的转换,并讨论这些转换和确定性LOCC纠缠转换之间的关系。

英文摘要:

In quantum operations, probabilities characterise both the degree of the success of a state transformation and, as density operator eigenvalues, the degree of mixedness of the final state. We give a unified treatment of pure-to-pure state transformations, covering both probabilistic and deterministic cases. We then discuss the role of majorization in describing the dynamics of mixing in quantum operations. The conditions for mixing enhancement for all initial states are derived. We show that mixing is monotonically decreasing for deterministic pure-to-pure transformations, and discuss the relationship between these transformations and deterministic LOCC entanglement transformations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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