Dresden 2026 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 45: Many-body Systems: Equilibration, Chaos, and Localization (joint session DY/TT)
TT 45.7: Talk
Wednesday, March 11, 2026, 11:15–11:30, HÜL/S186
Entanglement in bipartite systems with symmetry: coupled chaotic kicked Bose-Hubbard systems — •Jan Himmelsbach1, Maximilian F.I. Kieler1,2, and Arnd Bäcker1 — 1TU Dresden, Institut für Theoretische Physik, Dresden, Germany — 2CESAM research unit, University of Liège, B-4000 Liège, Belgium
We study the eigenstate entanglement of a time-periodically driven Bose-Hubbard system in a bipartite setting with a tunable coupling between two subsystems. By incorporating the symmetry of the particle conservation and employing perturbation theory we find that the entanglement transition for varying coupling strength is described by a universal transition parameter. It turns out that the entanglement transition is governed by localization for the particle conservation symmetry and a thermalizing process between the subsystems.
Keywords: entanglement; thermalization; localization; Bose-Hubbard system