2019/05/31 by Berislav Buča, Berislav Buca, Dieter Jaksch
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Dissipation #Environmental science #Physics #Quantum #Quantum mechanics #Quantum optics and atomic interactions #Statistical physics #cond-mat.quant-gas #cond-mat.stat-mech #physics.atom-ph #quant-ph
paper · pdf · doi:10.1103/physrevlett.123.260401
published as Phys. Rev. Lett. 123, 260401 (2019) · Main text: 5 pages, 3 figures and Supplemental material: 6 pages, 2 figures. Version as accepted by Phys. Rev. Lett
openalex publication_date 2019/12/23 · arxiv created 2019/12/31 · arxiv updated 2020/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Nonstationary longtime dynamics was recently observed in a driven two-component Bose-Einstein condensate coupled to an optical cavity [N. Dogra, M. Landini, K. Kroeger, L. Hruby, T. Donner, and T. Esslinger, arXiv:1901.05974] and analyzed in mean-field theory. We solve the underlying model in the thermodynamic limit and show that this system is always dynamically unstable-even when mean-field theory predicts stability. Instabilities always occur in higher-order correlation functions leading to squeezing and entanglement induced by cavity dissipation. The dynamics may be understood as the formation of a dissipative time crystal. We use perturbation theory for finite system sizes to confirm the nonstationary behavior.