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A Schwarzian on the Stretched Horizon
Published 24 Mar 2022 in hep-th and gr-qc | (2203.13323v2)
Abstract: It is well known that the Euclidean black hole action has a boundary term at the horizon proportional to the area. I show that if the horizon is replaced by a stretched horizon with appropriate boundary conditions, a new boundary term appears, described by a Schwarzian action similar to the recently discovered boundary actions in "nearly anti-de Sitter" gravity.
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