QED trace anomaly, non-local Lagrangians and quantum equivalence principle violations
QED trace anomaly, non-local Lagrangians and quantum equivalence principle violations
复制标题
QED 迹线异常、非局部拉格朗日量和违反量子等效原理
DOI:
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
B. K. El
中科院分区:
文献类型:
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作者:
J. Donoghue;B. K. El
A bstractWe discuss the derivation of the trace anomaly using a non-local effective action at one loop. This provides a simple and instructive form and emphasizes infrared physics. We then use this example to explore several of the properties of non-local actions, including displaying the action for the full non-local energy-momentum tensor. As an application, we show that the long-distance corrections at one loop lead to quantum violations of some classical consequences of the equivalence principle, for example producing a frequency dependence of the gravitational bending of light.