• DOI:10.1103/PhysRevX.11.041046
• Corpus ID: 233407664

Emerging Dissipative Phases in a Superradiant Quantum Gas with Tunable Decay

@article{Ferri2021EmergingDP,
  title={Emerging Dissipative Phases in a Superradiant Quantum Gas with Tunable Decay},
  author={Francesco Ferri and Rodrigo Rosa-Medina and Fabian Finger and Nishant Dogra and Matteo Soriente and Oded Zilberberg and Tobias Donner and Tilman Esslinger},
  journal={Physical Review X},
  year={2021}
}

• F. Ferri, Rodrigo Rosa-Medina, +5 authors T. Esslinger
• Published 26 April 2021
• Physics
• Physical Review X

Exposing a many-body system to external drives and losses can transform the nature of its phases and opens perspectives for engineering new properties of matter. How such characteristics are related to the underlying microscopic processes of the driven and dissipative system is a fundamental question. Here we address this point in a quantum gas that is strongly coupled to a lossy optical cavity mode using two independent Raman drives, which act on the spin and motional degrees of freedom of the atoms. This setting allows us to control the competition between coherent dynamics and dissipation by adjusting the imbalance between the drives. For strong enough coupling, the transition to a superradiant phase occurs, as is the case for a closed system. Yet, by imbalancing the drives we can enter a dissipation-stabilized normal phase and a region of multistability. Measuring the properties of excitations on top of the out-of-equilibrium phases reveals the microscopic elementary processes in the open system. Our findings provide prospects for studying squeezing in non-Hermitian systems, quantum jumps in superradiance, and dynamical spin-orbit coupling in a dissipative setting.