Matrix Models and Deformations of JT Gravity

Abstract

Recently, it has been found that JT gravity, which is a two-dimensional theory with bulk action $-\frac{1}{2}\int {\mathrm{d}}^{2}x\sqrt{g}\varphi (R+2)$, is dual to a matrix model, that is, a random ensemble of quantum systems rather than a specific quantum mechanical system. In this article, we argue that a deformation of JT gravity with bulk action $-\frac{1}{2}\int {\mathrm{d}}^{2}x\sqrt{g}(\varphi R+W(\varphi ))$ is likewise dual to a matrix model. With a specific procedure for defining the path integral of the theory, we determine the density of eigenvalues of the dual matrix model. There is a simple answer if $W(0)=0$, and otherwise a rather complicated answer.

37 pp

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