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arXiv 0704.0052hep-th
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弯曲背景下的量子场论。II。时空对称性

Quantum Field Theory on Curved Backgrounds. II. Spacetime Symmetries

Arthur Jaffe, Gordon Ritter

摘要:

我们研究静态时空中标量量子场论(包括相互作用理论)的时空对称性。首先考虑静态黎曼流形上的欧氏量子场论,证明了等距群是由具有自伴量子化或幺正量子化的单参数子群生成的。我们将自伴半群解析地延拓为单参数酉群,从而构造了相应洛伦兹流形的等距群的酉表示。以双曲空间为例说明了该方法,其洛伦兹延拓是Anti-de Sitter空间。

英文摘要:

We study space-time symmetries in scalar quantum field theory (including interacting theories) on static space-times. We first consider Euclidean quantum field theory on a static Riemannian manifold, and show that the isometry group is generated by one-parameter subgroups which have either self-adjoint or unitary quantizations. We analytically continue the self-adjoint semigroups to one-parameter unitary groups, and thus construct a unitary representation of the isometry group of the associated Lorentzian manifold. The method is illustrated for the example of hyperbolic space, whose Lorentzian continuation is Anti-de Sitter space.

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