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arXiv 1107.2887hep-th
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Schwinger模型中的热手征anomaly

The thermal chiral anomaly in the Schwinger model

Ashok Das, J. Frenkel

摘要:

在有限温度下的Schwinger模型中,我们导出了由电场\cite{frenkel}的长距离行为引起的手征反常的封闭形式结果。我们讨论的一般性质与此热异常,以及它与狄拉克算子的“指数”的关系。我们进一步表明,热异常,像零温度异常,这是由紫外线行为的理论,不接受任何贡献,从更高的循环。最后,我们确定了完全有效的作用量,以及在封闭的时间路径形式主义的热分支的异常功能。

英文摘要:

In the Schwinger model at finite temperature, we derive a closed form result for the chiral anomaly which arises from the long distance behavior of the electric field \cite{frenkel}. We discuss the general properties associated with this thermal anomaly as well as its relation with the "index" of the Dirac operator. We further show that the thermal anomaly, like the zero temperature anomaly which arises from the ultraviolet behavior of the theory, does not receive any contribution from higher loops. Finally, we determine the complete effective action as well as the anomaly functional on both the thermal branches in the closed time path formalism.

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