Virtual Department Colloquium: Tues May 19, 2020 - Symmetry in Quantum Gravity

Event Date: 

Tuesday, May 19, 2020 - 3:30pm

Event Date Details: 

Zoom Only, link on flyer

Event Location: 

  • Zoom
  • Physics Department Colloquium

Symmetry is one of our most important tools for understanding physical systems, but it has long been expected that the consistency of quantum gravity imposes powerful restrictions on what kinds of symmetries are possible.  In particular it has been argued that in quantum gravity no global symmetries are allowed, and also that there must be dynamical objects carrying all possible gauge charges. In this talk I will give an overview of recent work with Hirosi Ooguri, in which we show that both of these conjectures necessarily hold within our best theories of quantum gravity to date: the AdS/CFT correspondence.  I'll also clarify several interesting conceptual issues about the meaning of global and gauge symmetry, and comment on possible phenomenological applications.