Spectral gaps without frustration

PIRSA ID: 19110111
Series: Perimeter Institute Quantum Discussions
Event Type: Seminar
Scientific Area(s):
Other
End date:
Speaker(s):
  • Marius Lemm, Harvard University
November 13, 2019 at 4:00 PM Bob Room

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.