JT gravity at finite cutoff

Luca V. Iliesiu, Jorrit Kruthoff, Gustavo J. Turiaci, Herman Verlinde

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


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 wavefunctional 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 T T¯ deformation in 2D CFTs. This equality can be seen as concrete evidence for the proposed holographic interpretation of the T T¯ deformation as the movement of the AdS boundary to a finite radial distance in the bulk.

Original languageEnglish (US)
Article number023
JournalSciPost Physics
Issue number2
StatePublished - 2020

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


Dive into the research topics of 'JT gravity at finite cutoff'. Together they form a unique fingerprint.

Cite this