High Energy Theory Seminar - POSTPONED

This talk is postponed. Check seminar webpage for new date.

In this talk, I will review recent works done in collaboration with L. Ciambelli and R. Leigh, focusing on the non-perturbative characterization of the gravitational phase space along null boundaries. I will present the construction of the Carrollian curved geometry, the Poisson bracket and discuss the construction of a field-dependent time called dressing time that allows the construction of a positive definite boost generator for expanding null surfaces. I will show that this perspective allow us to revive the membrane paradigm and describe null Horizons as thermodynamical Carrollian fluid. If time permits, I will discuss some elements of the quantization and the appearance of a crucial Quantum central charge and the resolution of the problem of time. I will also discuss how these results connect to the celestial holography program when one treats the null boundary as an asymptotically null one.
I will only sketch why these results are important to address the upcoming interferometry experiments that are now being under construction to measure the light ray vacuum fluctuations.

The talk is in 469 Lauritsen.

Contact theoryinfo@caltech.edu for Zoom information.