JT gravity from partial reduction and defect extremal surface

Jun 20, 2022
8 pages
Published in:
  • JHEP 02 (2023) 219
  • Published: Feb 22, 2023
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Abstract: (Springer)
We propose the three-dimensional counterpart for Jackiw-Teitelboim gravity coupled with CFT2_{2} bath based on partial reduction. The three-dimensional counterpart is classical AdS gravity with a defect brane which has small fluctuation in transverse direction. We derive full Jackiw-Teitelboim gravity action by considering the transverse fluctuation as a dilaton field. We demonstrate that the fine-grained entropy computed from island formula precisely agrees with that computed from defect extremal surface. Our construction provides a Lorentzian higher dimensional counterpart for Jackiw-Teitelboim gravity glued to a bath and therefore offers a framework to study problems such as black hole information paradox.
Note:
  • 8 pages, 3 figures
  • AdS-CFT Correspondence
  • Holography and Condensed Matter Physics (AdS/CMT)
  • gravitation: action
  • gravitation: coupling
  • membrane model: defect
  • gravitation: anti-de Sitter
  • field theory: conformal
  • dimension: 3
  • black hole: information theory
  • duality