PIRSA:20050015

Video URL

https://pirsa.org/20050015

JT gravity at finite cutoff

Kruthoff, J. (2020). JT gravity at finite cutoff. Perimeter Institute for Theoretical Physics. https://pirsa.org/20050015

Kruthoff, Jorrit. JT gravity at finite cutoff. Perimeter Institute for Theoretical Physics, May. 05, 2020, https://pirsa.org/20050015 

          @misc{ scivideos_PIRSA:20050015,
            doi = {10.48660/20050015},
            url = {https://pirsa.org/20050015},
            author = {Kruthoff, Jorrit},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {JT gravity at finite cutoff},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2020},
            month = {may},
            note = {PIRSA:20050015 see, \url{https://scivideos.org/pirsa/20050015}}
          }

Jorrit Kruthoff Stanford University

Talk numberPIRSA:20050015
DOI10.48660/20050015
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

We compute the partition function of 2D Jackiw-Teitelboim (JT) gravity at finite cutoff in two ways: (i) via an exact evaluation of the Wheeler-DeWitt wave-functional in radial quantization and (ii) through a direct computation of the Euclidean path integral. Both methods deal with Dirichlet boundary conditions for the metric and the dilaton. In the first approach, the radial wavefunctionals are found by reducing the constraint equations to two first order functional derivative equations that can be solved exactly, including factor ordering. In the second approach we perform the path integral exactly when summing over surfaces with disk topology, to all orders in perturbation theory in the cutoff. Both results precisely match the recently derived partition function in the Schwarzian theory deformed by an operator analogous to the TT¯ deformation in 2D CFTs. This equality can be seen as concrete evidence for the proposed holographic interpretation of the TT¯ deformation as the movement of the AdS boundary to a finite radial distance in the bulk.