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Bistability and nonequilibrium condensation in a driven-dissipative Josephson array: A c-field model
- Source :
- SciPost Physics, Vol 15, Iss 2, p 068 (2023)
- Publication Year :
- 2023
- Publisher :
- SciPost, 2023.
-
Abstract
- 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.
Details
- Language :
- English
- ISSN :
- 25424653
- Volume :
- 15
- Issue :
- 2
- Database :
- Directory of Open Access Journals
- Journal :
- SciPost Physics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.82d6c71cd7f14a9181c223b7c6129d06
- Document Type :
- article
- Full Text :
- https://doi.org/10.21468/SciPostPhys.15.2.068