Brianna Grado-White (UCSB) “A perturbative perspective on self-supporting wormholes”
Alessandro Tomasiello (Università degli Studi di Milano-Bicocca, UNIMIB) “Holographic duals of S-folds”
S-folds are analogues of manifolds where transition functions are not just coordinate changes, as in any theory of gravity, but also involve elements of the S-duality group. Peculiar solutions like this have been the subject of intense speculation in the past few years, but it is usually hard to establish their existence, because the string coupling necessarily becomes strong in … Read More
Veronika Hubeny (UC Davis) “Holographic entropy relations”
Abstract: There exists a rich set of relations between entanglement entropies of a multi-partite quantum system, some applying universally to all quantum systems (such as strong sub-additivity), some pertaining to some limited but interesting subclass of systems (such as monogamy of mutual information in holography). We focus on QFTs with a holographic dual describing a classical geometry in the bulk, … Read More
Mark Mezei (Stonybrook) “Towards the hydrodynamic theory of entanglement”
Henry Maxfield (McGill) “The analytic bootstrap in 2D CFT, the Virasoro fusion kernel, and AdS3 gravity”
Xiaoliang Qi (Stanford) “Eternal traversable wormhole”
We construct a nearly-AdS2 solution describing an eternal traversable wormhole. The solution contains negative null energy generated by quantum fields under the influence of an external coupling between the two boundaries. In parallel, we discuss two SYK systems coupled by a relevant interaction. The physics of the two cases is very similar. They both share a “gravitational” subsector which is … Read More
Juan Maldacena (IAS) “Traversable wormhole solutions in four dimensions”
Abstract: We discuss a long traversable wormhole solution in four dimensions. Such solutions are forbidden in the classical theory, but allowed in the quantum case. It is “long” because it takes longer to go through the wormhole than through the ambient space, so it is consistent with causality. It is an illustration of a solution where spacetime has a non-trivial … Read More
Gary Horowitz (UCSB) “Cosmic Censorship in Anti-de Sitter Spacetime”
Charles Cao (Joint Center for Quantum Information and Computer Science, University of Maryland) “Finding Gravity in Quantum Mechanics: Towards Einstein’s Equation in Hilbert Space”
Abstract: We consider the emergence from quantum entanglement of spacetime geometry in a bulk region. For certain classes of quantum states in an appropriately factorized Hilbert space, a spatial geometry can be defined by associating areas along codimension-one surfaces with the entanglement entropy between either side. We show how Radon transforms can be used to convert this data into a … Read More
Stephen Shenker (Stanford) “Black holes, random matrices, baby universes and D-branes”
Black holes are quantum chaotic systems and so we expect their energy levels to be described by random matrix statistics. In this talk we discuss our progress in explaining these statistical properties using nonperturbative phenomena in quantum gravity.