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arXiv 1106.4086nucl-thhep-lat
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相对论性量子力学的欧几里德表述

A Euclidean formulation of relativistic quantum mechanics

Philip Kopp, Wayne Polyzou

摘要:

在本文中,我们讨论了相对论性量子力学的一个公式,使用欧几里德格林函数或生成泛函作为输入。这种形式主义与量子场论有着密切的关系,但作为希尔伯特空间上的线性算子理论,它具有量子力学的许多优点。这种方法的一个有趣的特点是,在物理希尔伯特空间上的归一化状态的运营商的矩阵元素可以直接使用欧几里德格林函数计算,而无需执行解析延拓。本文对该方法进行了总结。我们讨论了使用这种形式主义的动机,优点和困难。我们讨论如何计算束缚态,散射截面,和有限庞加莱变换,而不使用解析延拓。一个玩具模型被用来演示如何矩阵元素的exp(-β H)的归一化状态可以用来构建尖锐的动量转换矩阵元素。

英文摘要:

In this paper we discuss a formulation of relativistic quantum mechanics that uses Euclidean Green functions or generating functionals as input. This formalism has a close relation to quantum field theory, but as a theory of linear operators on a Hilbert space, it has many of the advantages of quantum mechanics. One interesting feature of this approach is that matrix elements of operators in normalizable states on the physical Hilbert space can be calculated directly using the Euclidean Green functions without performing an analytic continuation. The formalism is summarized in this paper. We discuss the motivation, advantages and difficulties in using this formalism. We discuss how to compute bound states, scattering cross sections, and finite Poincare transformations without using analytic continuation. A toy model is used to demonstrate how matrix elements of exp(-beta H) in normalizable states can be used to construct-sharp momentum transition matrix elements.

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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