Semiclassical Einstein equations from holography and boundary dynamics

Jan 28, 2023
34 pages
Published in:
  • JHEP 05 (2023) 212
  • Published: May 26, 2023
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Abstract: (Springer)
In this paper, we consider how to formulate semiclassical problems in the context of the AdS/CFT correspondence, based on the proposal of Compere and Marolf. Our prescription involves the effective action with self-action term for boundary dynamical fields, which can be viewed as imposing mixed boundary conditions for the gravity dual. We derive the semiclassical Einstein equations sourced by boundary CFT stress-energy tensor. Analyzing perturbations of the holographic semiclassical Einstein equations, we find a universal parameter γd_{d} which controls the contribution from boundary CFTs and specifies dynamics on the AdS boundary. As a simple example, we examine the semiclassical Einstein equations in 3-dimensions with 4-dimensional AdS gravity dual, and show that the boundary BTZ black hole with vanishing expectation value of the stress-energy tensor becomes unstable due to the backreaction from quantum stress-energy tensor when the parameter γd_{d} exceeds a certain critical value.
Note:
  • 34 page, 4 figures; one figure and refs added, some clarifications made, version to appear in JHEP
  • AdS-CFT Correspondence
  • Gauge-Gravity Correspondence
  • Einstein equation: semiclassical
  • tensor: energy-momentum
  • field theory: conformal
  • gravitation: duality
  • gravitation: anti-de Sitter
  • black hole: BTZ
  • holography
  • back reaction