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Q: Fachverband Quantenoptik und Photonik

Q 43: Ultracold Matter (Bosons) III (joint session Q/A)

Q 43.5: Vortrag

Mittwoch, 12. März 2025, 15:30–15:45, WP-HS

Suppression of Floquet Heating in a Driven Bose-Hubbard Chain via Bath-Engineering — •Lorenz Wanckel and André Eckardt — Technische Universität Berlin, Institut für Theoretische Physik, 10623 Berlin, Germany

Floquet engineering is a crucial control technique in ultracold quantum gas experiments, enabling the creation of effective Hamiltonians with properties that are otherwise difficult to achieve, such as topological nontrivial band structures. However, in isolated systems, these effective descriptions break down at long times due to Floquet heating and the stabilization by dissipation into a bath is generally an open question, as is the asymptotic state of driven dissipative systems. We investigate a driven Bose-Hubbard model and attempt to mitigate heating through weak dissipative coupling to a bath. We assess heating effects by analyzing the population of the ground state of the effective Hamiltonian in the asymptotic state, obtained from the Born-Markov master equation. Our analysis identifies two sources of heating and demonstrates how to choose parameters to effectively suppress heating.

Keywords: bose hubbard; floquet engineering; floquet heating; bath engineering; mott isolator