Fractons: A New Type of Particle

Who: Michael Pretko, University of Colorado
Friday, August 14, 2020 - 12:00pm

A fracton is an unusual new type of emergent quasiparticle found in various condensed matter systems.  Fractons are characterized by a set of mobility restrictions, which force isolated fractons to be strictly immobile, while certain bound states of fractons remain free to move.  This behavior leads to a variety of unusual phenomenology, such as non-ergodic and gravitational behavior, and may lead to advances in quantum memory storage.  In this talk, I will give a broad overview of the field of fractons, including both introductory material and recent advances.  I will describe the basics of the theoretical formalism for fractons in terms of tensor gauge theories and higher moment conservation laws.  I will then discuss various physical realizations of fractons, such as spin models and topological lattice defects, along with the unusual phenomenology exhibited by fractons.  I will conclude by outlining some open questions in the field.

The Zoom link will be updated on 15 minutes before the talk.