Event time:

Thursday, June 9, 2022 - 1:00pm to 2:00pm

Location:

Sloane Physics Laboratory SPL, Room 51

217 Prospect Street

New Haven, CT
06511
Speaker/Performer:

Carolyn Zhang - University of Chicago

Event description:

Deconfined quantum critical points (DQCPs) describe direct transitions between phases that have different, seemingly unrelated symmetries. Thus far, they have been studied primarily using field theory and numerical methods, due to the lack of analytically tractable lattice models. In this work, we construct an exactly solvable lattice model for a (1+1) dimensional DQCP. This DQCP occurs in the edge theory of a (2+1) dimensional bosonic symmetry protected topological (SPT) phase with Z_2xZ_2 symmetry. Using an exact mapping between the SPT edge theory and a Z_4 spin chain, we prove rigorously the existence of a DQCP and describe the full critical theory.

Host: Meng Cheng (m.cheng@yale.edu)

Admission:

Free

Contact:

(see "Description" above)