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arXiv 1306.1173hep-thhep-lat
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时空对称性与杨-米尔斯梯度流

Space-time symmetries and the Yang-Mills gradient flow

Luigi Del Debbio, Agostino Patella, Antonio Rago

摘要:

梯度流的引入为研究量子场论的动力学提供了新的工具。最新的发展表明了如何使用梯度流来探索对称性,以及相应的重整化Noether流的定义。本文引入了规范理论中沿梯度流的无穷小平移,并研究了相应的沃德恒等式。这种方法很容易推广到定义在格点上的规范理论的情况,其中调节器破坏平移不变性。在这种情况下,沃德恒等式导致能量-动量张量的非微扰重整化。我们讨论了这种方法在研究格上的标度不变性和标度不变性中的应用。

英文摘要:

The recent introduction of the gradient flow has provided a new tool to probe the dynamics of quantum field theories. The latest developments have shown how to use the gradient flow for the exploration of symmetries, and the definition of the corresponding renormalized Noether currents. In this paper we introduce infinitesimal translations along the gradient flow for gauge theories, and study the corresponding Ward identities. This approach is readily generalized to the case of gauge theories defined on a lattice, where the regulator breaks translation invariance. The Ward identities in this case lead to a nonperturbative renormalization of the energy-momentum tensor. We discuss an application of this method to the study of dilatations and scale invariance on the lattice.

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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