24. 04. 2025 13:00

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.

Seminar on Condensed Matter Theory

Group of Theoretical Physics organizes a regular seminar on theory of condensed matter physics.

Usually, we meet
every Thursdays at 13:00
Ke Karlovu 5, 121 16 Praha 2.

You are welcome to join us!

If you wish to receive regular updates on fothcoming seminars, contact K. Carva.