Condensation in hybrid superconducting cavity-microscopic spins systems with finite-bandwidth drive

Abstract

Using Keldysh field theory, we find conditions for non-equilibrium condensation in the open Tavis-Cummings model under a direct finite-bandwidth incoherent cavity drive. Experimentally, we expect the condensation transition to be easily accessible to hybrid superconducting systems coupled to microscopic spins, as well as to many other incoherently driven light-matter systems. In our theoretical analysis, we explicitly incorporate the drive's spectral distribution into the saddle-point description. We show that the injected incoherent photons create a drive-dependent effective coupling between spin-1/2 particles. The condensation transition arises at a critical regime of driving which we can now accurately predict. Our results also provide important guidelines for future quantum simulation experiments of non-equilibrium phases with hybrid devices.

References in corpus (9)

• Quantum technologies with hybrid systems
• Exciton-polariton condensates
• Strong Coupling of a Spin Ensemble to a Superconducting Resonator
• Dressed Collective Qubit States and the Tavis-Cummings Model in Circuit QED
• Observation of a dissipative phase transition in a one-dimensional circuit QED lattice
• Non-equilibrium quantum condensation in an incoherently pumped dissipative system
• BCS-BEC crossover in a system of microcavity polaritons
• Mean field theory and fluctuation spectrum of a pumped, decaying Bose-Fermi system across the quantum condensation transition
• Thermodynamics and Excitations of Condensed Polaritons in Disordered Microcavities