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High Energy Physics - Theory
Title: Thermal three-point functions from holographic Schwinger-Keldysh contours
(Submitted on 16 Nov 2022 (v1), last revised 6 Dec 2022 (this version, v2))
Abstract: We compute fully retarded scalar three-point functions of holographic CFTs at finite temperature using real-time holography. They describe the nonlinear response of a holographic medium under scalar forcing, and display single and higher-order poles associated to resonant QNM excitations. This involves computing the bulk-to-bulk propagator on a piecewise mixed-signature spacetime, the dual of the Schwinger-Keldysh contour. We show this construction is equivalent to imposing ingoing boundary conditions on a single copy of a black hole spacetime, similar to the case of the two-point function. We also compute retarded scalar correlators with stress-tensor insertions in general CFTs by solving Ward identities on the Schwinger-Keldysh contour.
Submission history
From: Benjamin Withers [view email][v1] Wed, 16 Nov 2022 19:00:04 GMT (819kb,D)
[v2] Tue, 6 Dec 2022 14:56:06 GMT (820kb,D)
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