De Sitter Breaking in Field Theory
De Sitter Breaking in Field Theory
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德西特突破场论
DOI：
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发表时间：
2004
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影响因子：
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通讯作者：
R. Woodard
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文献类型：
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作者：
R. Woodard
我反对广泛的概念，即充分德西特流形上的显式德西特不变性是有用的，甚至可以实现规范理论。绿色的功能和传播计算的德西特不变的规范一般比在一些非不变的规范更复杂。更糟糕的是，在德西特不变规范中求解规范固定场方程通常会导致对原始规范不变场方程的破坏。最有趣的自由量子场论没有可归一化的德西特不变态。这就排除了德西特不变传播子的存在。即使有这样的传播子存在，红外发散过程仍然会打破德西特不变性。
I argue against the widespread notion that manifest de Sitter invariance on the full de Sitter manifold is either useful or even attainable in gauge theories. Green's functions and propagators computed in a de Sitter invariant gauge are generally more complicated than in some noninvariant gauges. What is worse, solving the gauge-fixed field equations in a de Sitter invariant gauge generally leads to violations of the original, gauge invariant field equations. The most interesting free quantum field theories possess no normalizable, de Sitter invariant states. This precludes the existence of de Sitter invariant propagators. Even had such propagators existed, infrared divergent processes would still break de Sitter invariance.