The entropy of bulk quantum fields and the entanglement wedge of an evaporating black hole

A bstract Bulk quantum fields are often said to contribute to the generalized entropy $$ \frac{A}{4{G}_N}+{S}_{\mathrm{bulk}} $$ A 4 G N + S bulk only at O (1). Nonetheless, in the context of evaporating black holes, O (1 /GN ) gradients in S bulk can arise due to large boosts, introducing a quantum extremal surface far from any classical extremal surface. We examine the effect of such bulk quantum effects on quantum extremal surfaces (QESs) and the resulting entanglement wedge in a simple two-boundary 2 d bulk system defined by Jackiw-Teitelboim gravity coupled to a 1+1 CFT. Turning on a coupling between one boundary and a further external auxiliary system which functions as a heat sink allows a…

• NS
  National Science Foundation

  Awards: PHY-1620059, PHY1801805
• PU
  Princeton University