Stress Tensor Correlators in the Schwinger-Keldysh Formalism

Details Stress Tensor Correlators in the Schwinger-Keldysh Formalism Stress Tensor Correlators in the Schwinger-Keldysh Formalism

2004-10-29

arxiv.org/abs/gr-qc/0411003v2

Class.Quant.Grav. 22 (2005) 1637-1647

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, LaTeX 2epsilon, no figures, revised for publication

Scientific paper

10.1088/0264-9381/22/9/011

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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