Dresden 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 50: Many-Body Localization

TT 50.2: Vortrag

Mittwoch, 18. März 2020, 18:15–18:30, HSZ 204

Dynamics of spin chains in the presence of long-range interactions — •Sebastian Wenderoth1, Seelam Rajagopala1, Nathan Ng2, Michael Kolodrubetz3, Eran Rabani2, and Michael Thoss11Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany — 2Department of Physics and Chemistry, University of California, Berkeley, California, United States — 3Department of Physics, The University of Texas at Dallas, Richardson, Texas, United States

In many-body localized (MBL) systems local observables do not equilibrate under unitary quantum dynamics and, therefore, these systems cannot be described within the framework of quantum statistical mechanics. Usually, the MBL phase is studied in locally interacting systems with static disorder e.g. a disordered Ising chain with nearest neighbour interactions. [1] Here, we study a disordered Ising chain in which all spins couple to a central d-level system (qudit), which induces spin flip interactions. Employing the multilayer multiconfiguration time-dependent Hartree approach [2,3], we are able to simulate the dynamics of large spin chains in a numerically exact way. Using this approach, we examine dynamical signatures of the localized and thermalizing phases at much larger system sizes than those achievable with exact diagonalization, consistent with having converged to the thermodynamic limit.

[1] A. Pal et al., Phys. Rev. B 82, 174411 (2010).

[2] O. Vendrell et al., J. Chem. Phys. 134, 044135 (2011).

[3] H. Wang et al., J. Chem. Phys. 119, 1289 (2003).

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2020 > Dresden