Boundary Description of Microstates of the Two-Dimensional Black Hole

Abstract

We identify the microstates of the non supersymmetric, asymptotically flat 2d black hole in the dual c=1 matrix quantum mechanics (MQM). We calculate the partition function of the theory using Hamiltonian methods and reproduce one of two conflicting results found by Kazakov and Tseytlin. We find the entropy by counting states and the energy by solving the Schrodinger equation. The dominant contribution to the partition function in the double scaling limit is a novel bound state that can be considered an explicit dual of the black hole microstates. This bound state is long lived and evaporates slowly, exactly like a black hole in asymptotically flat space.

54 pages, 16 figures. v2: new figures, corrected calculation of variance and evaporation rate, and some minor changes. v3: minor changes, version accepted for publication in SciPost Physics

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Cited by in corpus (1)

• Minimal Areas from Entangled Matrices