Exact Semiclassical Gravity and Partial Cauchy Slice Holography

Explore advanced theoretical physics concepts in this 43-minute conference talk from the Workshop on Quantum Aspects of Black Holes and Spacetime at the Institute for Advanced Study. Delve into a rigorous Lorentzian axiomatic framework for establishing quantum gravity theorems, with particular focus on the quantum extremal surface prescription and its regime of validity in the limit where G approaches zero while cG remains fixed, where c represents the number of matter species. Examine how exactness in cG enables the framework to extend non-perturbatively beyond Einstein gravity, and discover constraints on singularity-resolution scenarios through two explicit geometric solutions demonstrating both resolved and unresolved singularities. Learn about preliminary research on holographic encoding of Lorentzian subregions via gravitational path integrals, including a detailed computation of black hole entropy derived directly from bulk partial Cauchy-slice preparations in the Lorentzian sector, and understand the potential applications of this innovative approach to quantum gravity and black hole physics.