TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.15.2.068
TI  - Bistability and nonequilibrium condensation in a driven-dissipative Josephson array: A c-field model
PY  - 2023/08/22
UR  - https://scipost.org/SciPostPhys.15.2.068
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 15
IS  - 2
SP  - 068
A1  - Reeves, Matt
AU  - Davis, Matthew J.
AB  - Developing theoretical models for nonequilibrium quantum systems poses significant challenges. Here we develop and study a multimode model of a driven-dissipative Josephson junction chain of atomic Bose-Einstein condensates, as realised in the experiment of Labouvie et al. [Phys. Rev. Lett. 116, 235302 (2016)]. The model is based on c-field theory, a beyond-mean-field approach to Bose-Einstein condensates that incorporates fluctuations due to finite temperature and dissipation. We find the c-field model is capable of capturing all key features of the nonequilibrium phase diagram, including bistability and a critical slowing down in the lower branch of the bistable region. Our model is closely related to the so-called Lugiato-Lefever equation, and thus establishes new connections between nonequilibrium dynamics of ultracold atoms with nonlinear optics, exciton-polariton superfluids, and driven damped sine-Gordon systems.
ER  -

@Article{10.21468/SciPostPhys.15.2.068,
	title={{Bistability and nonequilibrium condensation in a driven-dissipative Josephson array: A c-field model}},
	author={Matthew T. Reeves and Matthew J. Davis},
	journal={SciPost Phys.},
	volume={15},
	pages={068},
	year={2023},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.15.2.068},
	url={https://scipost.org/10.21468/SciPostPhys.15.2.068},
}