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Stress Tensor Correlators in the Schwinger-Keldysh Formalism

L. H. Ford·R. P. Woodard
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Abstract

We express stress tensor correlators using the Schwinger-Keldysh formalism. The absence of off-diagonal counterterms in this formalism ensures that the +- and -+ correlators are free of primitive divergences. We use dimensional regularization in position space to explicitly check this at one loop order for a massless scalar on a flat space background. We use the same procedure to show that the ++ correlator contains the divergences first computed by `t Hooft and Veltman for the scalar contribution to the graviton self-energy.

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L. H. Ford, R. P. Woodard. 2005-03-09. Stress Tensor Correlators in the Schwinger-Keldysh Formalism. https://doi.org/10.1088/0264-9381%2F22%2F9%2F011

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