Floquet-heating-induced Bose condensation in a scar-like mode of an open
driven optical-lattice system
- URL: http://arxiv.org/abs/2204.07147v2
- Date: Fri, 5 Aug 2022 15:30:01 GMT
- Title: Floquet-heating-induced Bose condensation in a scar-like mode of an open
driven optical-lattice system
- Authors: Alexander Schnell, Ling-Na Wu, Artur Widera, Andr\'e Eckardt
- Abstract summary: We show that the interplay of bath-induced dissipation and controlled Floquet heating can give rise to non-equilibrium Bose condensation.
Our predictions are based on a microscopic model that is solved using kinetic equations of motion derived from Floquet-Born-Markov theory.
- Score: 62.997667081978825
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Periodically driven quantum systems suffer from heating via resonant
excitation. While such Floquet heating guides a generic isolated system towards
the infinite-temperature state, a driven open system, coupled to a thermal
bath, will approach a non-equilibrium steady state. We show that the interplay
of bath-induced dissipation and controlled Floquet heating can give rise to
non-equilibrium Bose condensation in a mode protected from Floquet heating. In
particular, we consider a one-dimensional (1D) Bose gas in an optical lattice
of finite extent, which is coupled weakly to a three-dimensional thermal bath
given by a second atomic species. The bath temperature $T$ lies well above the
crossover temperature, below which the majority of the system's particles form
a (finite-size) Bose condensate in the ground state. However, when a strong
local potential modulation is switched on, which resonantly excites the system,
a non-equilibrium Bose condensate is formed in a state that decouples from the
drive. Our predictions, which are based on a microscopic model that is solved
using kinetic equations of motion derived from Floquet-Born-Markov theory, can
be probed under realistic experimental conditions.
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