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Spontaneous Lorentz violation in gauge theories

机译:规范理论中自发的洛伦兹违反

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Frohlich, Morchio and Strocchi long ago proved that the Lorentz invariance is spontaneously broken in QED because of infrared effects. We develop a simple model where the consequences of this breakdown can be explicitly and easily calculated. For this purpose, the superselected U(1) charge group of QED is extended to a superselected "Sky" group containing direction-dependent gauge transformations at infinity. It is the analog of the Spi group of gravity. As Lorentz transformations do not commute with Sky, they are spontaneously broken. These Abelian considerations and model are extended to non-Abelian gauge symmetries. Basic issues regarding the observability of twisted non-Abelian gauge symmetries and of the asymptotic ADM symmetries of quantum gravity are raised.
机译:Frohlich,Morchio和Strocchi很久以前就证明,由于红外效应,QED中的Lorentz不变性被自发打破。我们开发了一个简单的模型,可以明确,轻松地计算出这种故障的后果。为此,将QED的超选择U(1)电荷组扩展到包含无限远处与方向相关的规范变换的超选择“天空”组。它是Spi重心组的类似物。由于Lorentz变换不会与Sky上下班,因此它们会自然破裂。这些阿贝尔考虑因素和模型扩展到了非阿贝尔规对称性。提出了有关扭曲的非阿贝尔规范对称性和量子引力的渐近ADM对称性的可观性的基本问题。

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