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arXiv quant-ph/0005072quant-ph
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干涉测量中混合态的几何相位

Geometric phases for mixed states in interferometry

Erik Sjöqvist, Arun K. Pati, Artur Ekert, Jeeva S. Anandan, Marie Ericsson, Daniel K. L. Oi, Vlatko Vedral

摘要:

我们提供了一个物理处方的基础上干涉引入的总相位的混合状态进行幺正演化,这在过去一直是一个难以捉摸的概念。我们定义的平行输运条件,提供了一个连接的形式获得的几何相位的混合状态。当系统经历非循环幺正量子演化时,混合态的几何相位表达式退化为纯态情形下的已知公式。

英文摘要:

We provide a physical prescription based on interferometry for introducing the total phase of a mixed state undergoing unitary evolution, which has been an elusive concept in the past. We define the parallel transport condition that provides a connection-form for obtaining the geometric phase for mixed states. The expression for the geometric phase for mixed state reduces to well known formulas in the pure state case when a system undergoes noncyclic and unitary quantum evolution.

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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