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arXiv quant-ph/0008052quant-phgr-qchep-thmath-phmath.MP
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连续时间历程:可观测量、概率、相空间结构和经典极限

Continuous-time histories: observables, probabilities, phase space structure and the classical limit

Charis Anastopoulos

摘要:

本文阐述了量子理论的连续时间历史描述的结构,它源于自洽历史方案。特别地,我们研究了历史希尔伯特空间的构造,历史观测量的识别和退相干泛函(包含概率信息的对象)的形式。它示出了后者是如何等价于封闭的时间路径(CTP)生成功能。我们还研究了相空间结构的理论首先通过建设的一般表示的历史组(类似的Weyl组)和实施的历史Wigner-Weyl变换。后者使我们能够只用相空间量来描述量子理论。这些结果使得实现一个算法,用于确定一个一般的量子系统的经典(随机)的限制。

英文摘要:

In this paper we elaborate on the structure of the continuous-time histories description of quantum theory, which stems from the consistent histories scheme. In particular, we examine the construction of history Hilbert space, the identification of history observables and the form of the decoherence functional (the object that contains the probability information). It is shown how the latter is equivalent to the closed-time-path (CTP) generating functional. We also study the phase space structure of the theory first through the construction of general representations of the history group (the analogue of the Weyl group) and the implementation of a histories Wigner-Weyl transform. The latter enables us to write quantum theory solely in terms of phase space quantities. These results enable the implementation of an algorithm for identifying the classical (stochastic) limit of a general quantum system.

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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