Firewalls in AdS/CFT

TL;DR

This paper sharpens the firewall paradox within the AdS/CFT framework, arguing that a thermal state in the CFT corresponds to a firewall in the dual gravitational description.

Contribution

It clarifies the firewall argument by explicitly connecting the thermal state in the CFT to the presence of a firewall in the dual AdS spacetime.

Findings

The dual of a thermal CFT state is a firewall in AdS.

Locality assumptions outside the horizon are crucial for firewall arguments.

The paper refines the understanding of black hole information paradox in holography.

Abstract

Several recent papers argue against firewalls by relaxing the requirement for locality outside the stretched horizon. In the firewall argument, locality essentially serves the purpose of ensuring that the degrees of freedom required for infall are those in the proximity of the black hole and not the ones in the early radiation. We make the firewall argument sharper by utilizing the AdS/CFT framework and claim that the firewall argument essentially states that the dual to a thermal state in the CFT is a firewall.