Seminar on Condensed Matter Theory
Group of Theoretical Physics at the Department of Condensed Matter Physics
of Charles University has a pleasure to invite you to attend the seminar
on 24th April 2025 at 13:00
at Faculty of Mathematics and Physics of Charles University, Ke Karlovu 5, 121 16 Praha 2
Seminar room F 052
František Slanina
Entanglement entropy and thermalization in a hypercube model of many-body localization
František Slanina » Entanglement entropy and thermalization in a hypercube model of many-body localization
Location: seminar room F155KFM, Ke Karlovu 5
A schematic model of interacting spins in random field is introduced, which combines the symmetry of hypercube with the simplicity of random regular graph with degree three. We study the many-body localization transition in this model. Namely, we investigate the transition in terms of the entanglement entropy and entanglement spectrum and stress the fundamental importance of finite-size corrections. We also show that the most significant indicator of the localization transition is the breakdown of eigenstate thermalization hypothesis. At the transition, the distribution of matrix elements of local operators changes from Gasussian to bimodal. Such qualitative change also provides a good estimate for the critical disorder strength.