## Quantum Symmetries

**Date:**
21 January - 29 May 2020

**Location: ** MSRI

**Event type:**
Extended Format

**Organisers: ** Vaughan Jones (Vanderbilt), Scott Morrison (ANU), Victor Ostrik (Oregon), Emily Peters (Loyola), Eric Rowell (Texas A&M), Noah Snyder (Indiana), Chelsea Walton (Illinois, Urbana-Champaign)

**Website:**www.msri.org/programs/312

Symmetry, as formalized by group theory, is ubiquitous across mathematics and science. Classical examples include point groups in crystallography, Noether’s theorem relating differentiable symmetries and conserved quantities, and the classification of fundamental particles according to irreducible representations of the Poincaré group and the internal symmetry groups of the standard model. However, in some quantum settings, the notion of a group is no longer enough to capture all symmetries. Important motivating examples include Galois-like symmetries of von Neumann algebras, anyonic particles in condensed matter physics, and deformations of universal enveloping algebras. The language of tensor categories provides a unified framework to discuss these notions of quantum symmetry.

Professor Daniel Freed (Texas A&M) has been appointed as a Clay Senior Scholar to participate in this program.

CMI Enhancement and Partnership Program