Fluctuation-Induced Bistability of Fermionic Atoms Coupled to a Dissipative Cavity
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arXiv
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| Format: | Preprint |
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2024
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| author | Tolle, Luisa Sheikhan, Ameneh Giamarchi, Thierry Kollath, Corinna Halati, Catalin-Mihai |
| author_facet | Tolle, Luisa Sheikhan, Ameneh Giamarchi, Thierry Kollath, Corinna Halati, Catalin-Mihai |
| contents | We investigate the steady state phase diagram of fermionic atoms subjected to an optical lattice and coupled to a high finesse optical cavity with photon losses. The coupling between the atoms and the cavity field is induced by a transverse pump beam. Taking fluctuations around the mean-field solutions into account, we find that a transition to a self-organized phase takes place at a critical value of the pump strength. In the self-organized phase the cavity field takes a finite expectation value and the atoms show a modulation in the density. Surprisingly, at even larger pump strengths two self-organized stable solutions of the cavity field and the atoms occur, signaling the presence of a bistability. We show that the bistable behavior is induced by the atoms-cavity fluctuations and is not captured by the mean-field approach. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_16035 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Fluctuation-Induced Bistability of Fermionic Atoms Coupled to a Dissipative Cavity Tolle, Luisa Sheikhan, Ameneh Giamarchi, Thierry Kollath, Corinna Halati, Catalin-Mihai Quantum Gases Strongly Correlated Electrons Quantum Physics We investigate the steady state phase diagram of fermionic atoms subjected to an optical lattice and coupled to a high finesse optical cavity with photon losses. The coupling between the atoms and the cavity field is induced by a transverse pump beam. Taking fluctuations around the mean-field solutions into account, we find that a transition to a self-organized phase takes place at a critical value of the pump strength. In the self-organized phase the cavity field takes a finite expectation value and the atoms show a modulation in the density. Surprisingly, at even larger pump strengths two self-organized stable solutions of the cavity field and the atoms occur, signaling the presence of a bistability. We show that the bistable behavior is induced by the atoms-cavity fluctuations and is not captured by the mean-field approach. |
| title | Fluctuation-Induced Bistability of Fermionic Atoms Coupled to a Dissipative Cavity |
| topic | Quantum Gases Strongly Correlated Electrons Quantum Physics |
| url | https://arxiv.org/abs/2409.16035 |