Special Condensed Matter Theory Seminar: Yu-An Chen, University of Maryland, “Fermionic particles, fermionic loops, and gravitational anomalies”

Event time: 
Tuesday, April 19, 2022 - 1:00pm to 2:00pm
Sloane Physics Laboratory (SPL), Room 51 See map
217 Prospect Street
New Haven, CT 06511
Event description: 

We construct infinitely many new exactly solvable local commuting projector lattice Hamiltonian models for beyond group cohomology invertible bosonic topological phases in any spacetime dimensions, whose boundaries are characterized by gravitational anomalies. In particular, we will focus on the beyond cohomology invertible phase “w2w3” in (4+1)D, which has an anomalous (3+1)D boundary topological order with fermionic particle and fermionic loop excitations that have mutual statistics. Finally, we will demonstrate a few examples of fermionic loop excitations in (3+1)D toric codes.
Reference: https://arxiv.org/abs/2110.14644
Host: Meng Cheng (m.cheng@yale.edu)