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arXiv 1007.3922hep-thcond-mat.stat-mechquant-ph
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相对论粒子路径积分的超统计方法

Superstatistics approach to path integral for a relativistic particle

Petr Jizba, Hagen Kleinert

摘要:

超统计允许以一种新的方式从非相对论性单粒子路径的超统计平均值计算相对论性粒子的费曼传播子。我们说明这一点的克莱因-戈登粒子的Feshbach-Villars表示,和狄拉克粒子的薛定谔-狄拉克表示。作为一个副产品,我们恢复世界线表示的克莱因-戈登和狄拉克传播,并讨论了固定的重新参数化自由的涂抹分布的作用。从我们的方法,以及一个新的表示的洛伦兹群的Feshbach-Villars粒子的紧急相对论图片进行了讨论。

英文摘要:

Superstatistics permits the calculation of the Feynman propagator of a relativistic particle in a novel way from a superstatistical average over non-relativistic single-particle paths. We illustrate this for the Klein-Gordon particle in the Feshbach-Villars representation, and for the Dirac particle in the Schroedinger-Dirac representation. As a byproduct we recover the worldline representation of Klein-Gordon and Dirac propagators, and discuss the role of the smearing distributions in fixing the reparametrization freedom. The emergent relativity picture that follows from our approach together with a novel representation of the Lorentz group for the Feshbach-Villars particle are also discussed.

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