The crossover between lasing and polariton condensation in optical microcavities

Abstract

We study a model of a photon mode dipole-coupled to a medium of two-level oscillators in a microcavity in the presence of dephasing processes introduced by coupling to external baths. Decoherence processes can be classified as pair-breaking or non-pair-breaking in analogy with magnetic or non-magnetic impurities in superconductors. In the absence of dephasing, the ground state of the model is a polariton condensate with a gap in the excitation spectrum. Increase of the pair-breaking parameter $\gamma$ reduces the gap, which becomes zero at a critical value ${\gamma }_{C1}$; for large $\gamma$, the conventional laser regime is obtained in a way that demonstrates its close analogy to a gapless superconductor. In contrast, weak non-pair-breaking processes have no qualitative effect on the condensate or the existence of a gap, although they lead to inhomogeneous broadening of the excitations.

Cited by in corpus (18)

• Non-equilibrium quantum condensation in an incoherently pumped dissipative system
• Collective coherence in planar semiconductor microcavities
• BCS-BEC crossover in a system of microcavity polaritons
• Models of coherent exciton condensation
• Mean field theory and fluctuation spectrum of a pumped, decaying Bose-Fermi system across the quantum condensation transition
• A BCS wavefunction approach to the BEC-BCS crossover of exciton-polariton condensates
• Photon condensation in circuit QED by engineered dissipation
• Condensation of Cavity Polaritons in a Disordered Environment
• Polariton condensation and lasing in optical microcavities - the decoherence driven crossover
• Finite-size fluctuations and photon statistics near the polariton condensation transition in a single-mode microcavity
• Collective dynamics of excitons and polaritons in semiconductor nanostructures
• Absorption, Photoluminescence and Resonant Rayleigh Scattering Probes of Condensed Microcavity Polaritons
• Phase locking in quantum and classical oscillators: polariton condensates, lasers, and arrays of Josephson junctions
• Condensation and Lasing of Microcavity Polaritons: Comparison between two Models
• Towards room-temperature superfluidity of exciton polaritons in an optical microcavity with an embedded MoS${}_2$ monolayer
• Keldysh Green's function approach to coherence in a non-equilibrium steady state: connecting Bose-Einstein condensation and lasing
• The new physics of non-equilibrium condensates: insights from classical dynamics
• Theory of cavity-polariton self-trapping and optical strain in polymer chains