Duane Physics Room G126

Generalized Global Symmetries

When
-

Abstract:  Symmetry has proven to be of fundamental importance for describing Nature. I will discuss recent developments in various generalizations of global symmetries and their applications in quantum field theory, condensed matter physics, mathematics, and quantum gravity.  These new global symmetries exist in a variety of quantum systems, ranging from the Ising model, to topological phases of anyons and fractons, and even to the Standard Model.

First Laboratory Bounds on Ultralight Dark Photon Dark Matter from Precision Atomic Spectroscopy

When
-

Abstract: Ultralight bosonic dark matter has come under increasing scrutiny as a dark matter candidate that has the potential to resolve puzzles in astronomical observation. I demonstrate that high-precision measurements of time variation in the frequency ratios of atomic transitions achieve leading sensitivity to ultralight vector portal dark matter at low masses. These bounds are the first laboratory-based bounds on this class of dark matter models. I discuss further measurements that could enhance sensitivity to ultralight dark photons.

 

Hot band sound

When
-

Abstract: Chaotic lattice models at high temperature are generically expected to exhibit diffusive transport of all local conserved charges. Such diffusive transport is usually associated with overdamped relaxation of the associated currents. We argue that by appropriately tuning the inter-particle interactions, lattice models of chaotic fermions at infinite temperature can be made to cross over from an overdamped regime of diffusion to an underdamped regime of "hot band sound".

Subscribe to Duane Physics Room G126