Mathematical Physics Seminar, Tues, Sept 27, 4:30pm, Jadwin A06, Simone Warzel, TU-Munich, "Low Energy Spectra of Mean-Field Quantum Spin Systems"

Sep 27, 2022, 4:30 pm5:30 pm
Jadwin A06
Event Description

Quantum mean-field spin models of Lipkin-Meshkov-Glick or Curie-Weiss type generically exhibit a spectral gap in the ferromagnetic parameter regime. In this talk, I will explain semiclassical criteria for the presence of a spectral gap in such models and present formulas for their value alongside a complete description of the ground-state.  (Joint work with C. Manai)