arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1607.07074hep-th
收藏

有效平均action的协变和背景独立泛函RG流

Covariant and background independent functional RG flow for the effective average action

Mahmoud Safari, Gian Paolo Vacca

摘要:

我们扩展我们的处方建设一个协变和背景独立的有效作用量的标量量子场论的情况下,低于一定规模的动量模式被抑制的红外调节器的存在。关键的一步是一个适当的选择红外截止的沃德恒等式,捕捉信息从单场依赖的紫外行动,继续是完全可解的,因此,除了协方差,明确的背景独立的有效行动是保证在任何尺度。一个实际的结果是,在这个框架中,可以采用截断依赖于单一的总场。此外,我们还讨论了沿重整化群流对称性保持的充要条件。

英文摘要:

We extend our prescription for the construction of a covariant and background-independent effective action for scalar quantum field theories to the case where momentum modes below a certain scale are suppressed by the presence of an infrared regulator. The key step is an appropriate choice of the infrared cutoff for which the Ward identity, capturing the information from single-field dependence of the ultraviolet action, continues to be exactly solvable, and therefore, in addition to covariance, manifest background independence of the effective action is guaranteed at any scale. A practical consequence is that in this framework one can adopt truncations dependent on the single total field. Furthermore we discuss the necessary and sufficient conditions for the preservation of symmetries along the renormalization group flow.

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。

↑