## Theory seminar: Liam Fitzpatrick, Boston Univ.

Thursday, March 29, 2018 - 2:10pm

*** Thursday Theory Seminar ***

### Liam Fitzpatrick

*Boston University*

**Title & abstract TBA**

Theory seminars take place Monday afternoons at 2:10 PM in the Pupin Hall Theory Center on the 8th floor.

Thursday, March 29, 2018 - 2:10pm

**Title & abstract TBA**

Monday, April 2, 2018 - 2:10pm

**Title & abstract TBA**

Monday, April 9, 2018 - 2:10pm

**Title & abstract TBA**

Monday, April 16, 2018 - 2:10pm

This talk is devoted to Berry phases that appear in unitary representations of asymptotic symmetry groups in general relativity. These phases arise when a coherent state is acted upon by symmetry transformations that trace a closed path in the group manifold, and they can be evaluated exactly even when the group is infinite-dimensional.

Monday, April 23, 2018 - 2:10pm

**Title & abstract TBA**

Monday, April 30, 2018 - 2:10pm

**Title & abstract TBA**