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arXiv 1807.02181hep-thcond-mat.stat-mechgr-qc
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共形Anomaly和一种新的精确RG

The Conformal Anomaly and a new Exact RG

Oliver J. Rosten

摘要:

对于标量场理论,提出了精确RG到弯曲空间的一个新的推广,其中共形反常显式存在。真空项需要正则化,超出了Exact RG的规范公式,这可以通过添加某些自由场来实现,每个自由场都在非临界固定点。采用勒让德变换,调节场的唯一作用是去除发散真空项,并且它们没有明确地出现在有效平均作用中。作为一个例子,在d=2的情况下,积分共形反常和Polyakov作用量都被恢复。

英文摘要:

For scalar field theory, a new generalization of the Exact RG to curved space is proposed, in which the conformal anomaly is explicitly present. Vacuum terms require regularization beyond that present in the canonical formulation of the Exact RG, which can be accomplished by adding certain free fields, each at a non-critical fixed-point. Taking the Legendre transform, the sole effect of the regulator fields is to remove a divergent vacuum term and they do not explicitly appear in the effective average action. As an illustration, both the integrated conformal anomaly and Polyakov action are recovered for the Gaussian theory in d=2.

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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