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| Format: | Preprint |
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2025
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| Online-Zugang: | https://arxiv.org/abs/2509.25707 |
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| _version_ | 1866918202929315840 |
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| author | Ceulemans, Robbe Begg, Samuel E. Davis, Matthew J. Wouters, Michiel |
| author_facet | Ceulemans, Robbe Begg, Samuel E. Davis, Matthew J. Wouters, Michiel |
| contents | We identify and characterize a first-order dark-state phase transition between a discrete dark soliton and a uniform superfluid in a Bose-Hubbard chain with a single lossy site. Using classical-field (truncated-Wigner) simulations together with a Bogoliubov stability analysis, we show that the dark-state nature of the soliton suppresses fluctuations and shifts the critical point relative to the comparable phenomenon of optical bistability in driven-dissipative Kerr resonators. We then demonstrate that this mechanism quantitatively captures the bistability phase boundary observed in the experiment of R. Labouvie et al. [Phys. Rev. Lett. 116, 235302 (2016)], resolving substantial discrepancies in prior modeling efforts. Our results reveal how driving, dissipation and quantum coherence can interact to induce nonequilibrium phase transitions in ultra-cold atomic gases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_25707 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Dark Soliton Formation as a Dark-State Phase Transition in a Dissipative Superfluid Josephson Junction Chain Ceulemans, Robbe Begg, Samuel E. Davis, Matthew J. Wouters, Michiel Quantum Gases We identify and characterize a first-order dark-state phase transition between a discrete dark soliton and a uniform superfluid in a Bose-Hubbard chain with a single lossy site. Using classical-field (truncated-Wigner) simulations together with a Bogoliubov stability analysis, we show that the dark-state nature of the soliton suppresses fluctuations and shifts the critical point relative to the comparable phenomenon of optical bistability in driven-dissipative Kerr resonators. We then demonstrate that this mechanism quantitatively captures the bistability phase boundary observed in the experiment of R. Labouvie et al. [Phys. Rev. Lett. 116, 235302 (2016)], resolving substantial discrepancies in prior modeling efforts. Our results reveal how driving, dissipation and quantum coherence can interact to induce nonequilibrium phase transitions in ultra-cold atomic gases. |
| title | Dark Soliton Formation as a Dark-State Phase Transition in a Dissipative Superfluid Josephson Junction Chain |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2509.25707 |