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Condensed Matter > Quantum Gases

arXiv:2501.09497 (cond-mat)
[Submitted on 16 Jan 2025]

Title:Atom-Molecule Superradiance and Entanglement with Cavity-Mediated Three-Body Interactions

Authors:Yun Chen, Yuqi Wang, Jingjun You, Yingqi Liu, Su Yi, Yuangang Deng
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Abstract:Ultracold atoms coupled to optical cavities offer a powerful platform for studying strongly correlated many-body physics. Here, we propose an experimental scheme for creating biatomic molecules via cavity-enhanced photoassociation from an atomic condensate. This setup realizes long-range three-body interactions mediated by tripartite cavity-atom-molecule coupling. Beyond a critical pump strength, a self-organized square lattice phase for molecular condensate emerges, resulting in hybrid atom-molecule superradiance with spontaneous $U(1)$ symmetry breaking. Distinct from previously observed ultracold bosonic (fermionic) atomic superradiance, our findings demonstrate bosonic enhancement characterized by a cubic scaling of steady-state photon number with total atom number. Additionally, strong photon-matter entanglement is shown to effectively characterize superradiant quantum phase transition. Our findings deepen the understanding of quantum superchemistry and exotic many-body nonequilibrium dynamics in cavity-coupled quantum gases.
Comments: 5+8 pages, 4+2 figures,
Subjects: Quantum Gases (cond-mat.quant-gas)
Cite as: arXiv:2501.09497 [cond-mat.quant-gas]
  (or arXiv:2501.09497v1 [cond-mat.quant-gas] for this version)
  https://doi.org/10.48550/arXiv.2501.09497

Submission history

From: Yuangang Deng [view email]
[v1] Thu, 16 Jan 2025 12:17:31 UTC (17,985 KB)
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