|ALL EVENTS||HDR / Thesis||Seminars||Symposium / Congress|
|LNCMI||LPCNO||LPT||SFP / SFC|
- This event has passed.
Fermionic Entanglement Entropy from Nonequilibrium Work (Jonathan D’Emidio/ LPT / Seminar). – 10/05/2022, 14H
10 May; 14h00 - 15h30
Jonathan D’Emidio (DIPC, Saint-Sébastien)
Abstract : Computing entanglement entropies in strongly interacting many-body systems in two or more dimensions is a notoriously difficult task. Recently, however, a Monte Carlo method based on Jarzynski’s nonequilibrium work equality has enabled highly efficient calculations in quantum spin systems . I will show how this concept can be extended to determinental quantum Monte Carlo (DQMC) simulations of fermions, based on the decomposition introduced by T. Grover . Here the nonequilibrium method entirely avoids the severe limitations faced by existing DQMC techniques, which manifest themselves quite differently from the spin case. As a benchmark study I will provide data from T=0 projector simulations of the honeycomb Hubbard model.
 J. D’Emidio, Entanglement Entropy from Nonequilibrium Work, Phys. Rev. Lett. 124, 110602 (2020)
 T. Grover, Entanglement of Interacting Fermions in Quantum Monte Carlo Calculations, Phys. Rev. Lett. 111, 130402 (2013)