Schwinger-Keldysh Propagators from AdS/CFT Correspondence


We demonstrate how to compute real-time Green’s functions for a class of finite temperature field theories from their AdS gravity duals. In particular, we reproduce the 2× 2 SchwingerKeldysh matrix propagator from a gravity calculation. Our methods should work also for computing higher point Lorentzian signature correlators. We elucidate the boundary condition subtleties which hampered previous efforts to build a Lorentzian-signature AdS/CFT correspondence. For two-point correlators, our construction is automatically equivalent to the previously formulated prescription for the retarded propagator.

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@inproceedings{Herzog2002SchwingerKeldyshPF, title={Schwinger-Keldysh Propagators from AdS/CFT Correspondence}, author={Christopher P. Herzog and Dam Thanh Son}, year={2002} }