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arXiv 1010.0818hep-thhep-phquant-ph
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经典标量场论中的图

Diagrammar In Classical Scalar Field Theory

Enrico Cattaruzza, Ennio Gozzi, Antonio Francisco Neto

摘要:

在本文中,我们微扰地分析了具有和不具有温度的g φ ^4经典场论。为了做到这一点,我们使用了一段时间前发展的经典理论的路径积分方法。结果表明,由于在经典形式主义中存在额外的辅助场,在经典水平上出现的图比在量子水平上多得多。我们将表明,由于上述经典路径积分中存在的普遍超对称性,其中几个图相互抵消。同样的超对称性允许引入超场和超图,这大大简化了计算,并使经典微扰计算在形式上与量子计算几乎“相同”。利用超图技术,我们将经典微扰理论发展到三阶。最后,我们的波动耗散定理的微扰检查的文件。

英文摘要:

In this paper we analyze perturbatively a g phi^4 classical field theory with and without temperature. In order to do that, we make use of a path-integral approach developed some time ago for classical theories. It turns out that the diagrams appearing at the classical level are many more than at the quantum level due to the presence of extra auxiliary fields in the classical formalism. We shall show that several of those diagrams cancel against each other due to a universal supersymmetry present in the classical path integral mentioned above. The same supersymmetry allows the introduction of super-fields and super-diagrams which considerably simplify the calculations and make the classical perturbative calculations almost "identical" formally to the quantum ones. Using the super-diagrams technique we develop the classical perturbation theory up to third order. We conclude the paper with a perturbative check of the fluctuation-dissipation theorem.

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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