Spectral gaps without frustration

In quantum spin systems, the existence of a spectral gap above the ground state has strong implications for the low-energy physics. We survey recent results establishing spectral gaps in various frustration-free spin systems by verifying finite-size criteria. The talk is based on collaborations with Abdul-Rahman, Lucia, Mozgunov, Nachtergaele, Sandvik, Yang, Young, and Wang.

Event Type: 
Seminar
Speaker(s): 
Event Date: 
Mercredi, Novembre 13, 2019 - 16:00 to 17:30
Location: 
Bob Room
Room #: 
405