Physics

Abstract: I will talk about the adiabatic cycles of one-dimensional gapped Hamiltonians with non-invertible symmetry. Using quasiadiabatic evolution and the results of gapped phase classification, the adiabatic cycles can be classified by the...

Abstract: I will explain how the irreversibility of the renormalization group together with anomalies, including anomalies in the space of coupling constants, can be used to constrain the IR phases of defects in familiar quantum field theories. As...

Abstract: Recently a fruit fly brain was reconstructed in electron microscopic detail. Tens of millions of synapses were identified on over 100,000 neurons' entangled branches, which would span a football field if unraveled end to end. This "fly...

Abstract: I will review some benefits and consequences of using a Lorentzian gravitational path integral. Time permitting, I will mention some new results on how a Lorentzian path integral ameliorates apparent "entropy paradoxes" in asymptotically...

Abstract: I will discuss a simple model of topological gravity defined by a 3d TQFT summed over all geometries. I will explain how this sum is formulated so that the holographically dual boundary ensemble admits a probabilistic interpretation. This...

Abstract: A class of charged/rotating black holes in asymptotically Anti de-Sitter spacetime is known to undergo superradiant instabilities under which they tend to emit particles carrying charge/angular momentum. In this talk, I will describe new...

Abstract: Black holes (BHs) can acquire magnetosphere and horizon-penetrating magnetic fluxes from plasma inflow or mergers with magnetized neutron stars. Several numerical studies have shown that a black hole magnetosphere relaxes into a split...

Abstract: How much current does a sliding electron crystal carry? The answer to this simple question has important implications for the dynamic properties of the crystal, such as the frequency of its cyclotron motion, and its phonon spectrum. In...

Abstract:  I will talk about light-ray operators in QFTs, particularly in the critical O(N) model, focusing on the leading-twist and horizontal Regge trajectories. Conceptually, I will distinguish between light-ray operators in two conformal frames...