Fluctuation-induced Bistability of Fermionic Atoms Coupled to a Dissipative Cavity

• URL: http://arxiv.org/abs/2409.16035v1
• Date: Tue, 24 Sep 2024 12:33:06 GMT
• Title: Fluctuation-induced Bistability of Fermionic Atoms Coupled to a Dissipative Cavity
• Authors: Luisa Tolle, Ameneh Sheikhan, Thierry Giamarchi, Corinna Kollath, Catalin-Mihai Halati,
• Abstract summary: 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. We find that a transition to a self-organized phase takes place at a critical value of the pump strength. 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.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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 the mean-field approach.

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