Calendar
- 22January 22, 2023No events
- 23January 23, 2023No events
- 24January 24, 2023
CMSA Quantum Matter in Mathematics and Physics: Reflections on Parity Breaking
One approach to the Strong CP Problem (known as Nelson-Barr models) is to assume that parity is a gauge symmetry, which is spontaneously broken in the world around us. In this talk, we will describe the formal meaning of parity as a gauge symmetry, and argue that the domain walls formed from spontaneous parity breaking are exactly stable. This stability can be understood as the result of an unusual sort of conserved charge, which has features in common with both gauge charges and global charges. We will explain how these charges are compatible with the expected absence of global symmetries in quantum gravity, as well as their relationship with the Swampland Cobordism Conjecture.
For more information on how to join, please see: https://cmsa.fas.harvard.edu/event_category/quantum-matter-seminar/
- 25January 25, 2023No events
- 26January 26, 2023No events
- 27January 27, 2023
Gauge Theory and Topology: Homology cobordism and the geometry of hyperbolic three-manifolds
1 Oxford Street, Cambridge, MA 02138 USAA major challenge in the study of the structure of the three-dimensional homology cobordism group is to understand the interaction between hyperbolic geometry and homology cobordism. In this talk, I will discuss how monopole Floer homology can be used to study some basic properties of certain subgroups of the homology cobordism group generated by hyperbolic homology spheres satisfying some natural geometric constraints.
- 28January 28, 2023No events