Thermal decoherence of a nonequilibrium polariton fluid

Abstract

Exciton-polaritons constitute a unique realization of a quantum fluid interacting with its environment. Using Selenide based microcavities, we exploit this feature to warm up a polariton condensate in a controlled way and monitor its spatial coherence. We determine directly the amount of heat picked up by the condensate by measuring the phonon-polariton scattering rate and comparing it with the loss rate. We find that upon increasing the heating rate, the spatial coherence length decreases markedly, while localized phase structures vanish, in good agreement with a stochastic mean field theory. From the thermodynamical point-of-view, this regime is unique as it involves a nonequilibrium quantum fluid with no well-defined temperature, but which is nevertheless able to pick up heat with dramatic effects on the order parameter.

6 pages, 4 figures

References in corpus (14)

• Quantum fluids of light
• Bose-Einstein condensation of photons in an optical microcavity
• Excitations in a non-equilibrium Bose-Einstein condensate of exciton-polaritons
• Topological Polaritons
• Bose-Einstein Condensation of Long-Lifetime Polaritons in Thermal Equilibrium
• Spatial and spectral shape of inhomogeneous non-equilibrium exciton-polariton condensates
• Thermalisation of a two-dimensional photonic gas in a 'white-wall' photon box
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• Observing the Formation of Long-range Order during Bose-Einstein Condensation
• Evolutionary games of condensates in coupled birth-death processes
• Effect of interface disorder on quantum well excitons and microcavity polaritons
• A quantum Langevin model for non-equilibrium condensation
• Stochastic Gross-Pitaevskii Equation for the Dynamical Thermalization of Bose-Einstein Condensates
• Spectrum and thermal fluctuations of a microcavity polariton Bose-Einstein condensate

Cited by in corpus (8)

• Quantum-correlated photons from semiconductor cavity polaritons
• Kardar-Parisi-Zhang universality in the phase distributions of one-dimensional exciton-polaritons
• Topologically robust zero-sum games and Pfaffian orientation -- How network topology determines the long-time dynamics of the antisymmetric Lotka-Volterra equation
• Noise-induced transition from superfluid to vortex state in two-dimensional nonequilibrium polariton condensates
• Emergent Haldane Model and Photon-Valley Locking in Chiral Cavities
• Bogoliubov excitations driven by thermal lattice phonons in a quantum fluid of light
• Spontaneous formation of spin lattices in semimagnetic exciton-polariton condensates
• Determination of polariton condensates' critical temperature