IAS Quantum Aspects of Black Holes Group Meeting

Abstract: I will discuss some upcoming work with Jonah. We investigated the extent to which hallmark features of bulk gravity survive at finite string tension in holographic models. Working in the non-interacting limit, we model excited string modes as free particles. We demonstrate that the resulting Hagedorn spectrum leads to the breakdown of the split property for sufficiently nearby regions, which has numerous implications for the holographic model. For example, we find that applying the algebraic ER=EPR conjecture to disjoint regions that violate the split property leads to the appearance of type III_0 algebras, which provides a quantitative measure of how such regions are quantum-connected even if they are geometrically disjoint. We note that this is the first appearance of a type III_0 algebra in a setting of physical relevance to our knowledge. We further connect the violation of the split property to the stretched horizon, proposing an algebraic definition of the stringy stretched horizon. Finally, we argue that many of these results should persist once string interactions are included, which allows a well-defined notion of generalized entropy at finite string tension.