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arXiv · 2107.04424

Bose Polaron in a quantum fluid of light

Amit Vashisht·Maxime Richard·Anna Minguzzi
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Abstract

We study the Bose polaron problem in a nonequilibrium setting, by considering an impurity embedded in a quantum fluid of light realized by exciton-polaritons in a microcavity, subject to a coherent drive and dissipation on account of pump and cavity losses. We obtain the polaron effective mass, the drag force acting on the impurity, and determine polaron trajectories at a semiclassical level. We find different dynamical regimes, originating from the unique features of the excitation spectrum of driven-dissipative polariton fluids, in particular a non-trivial regime of acceleration against the flow. Our work promotes the study of impurity dynamics as an alternative testbed for probing superfluidity in quantum fluids of light.

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Amit Vashisht, Maxime Richard, Anna Minguzzi. 2021-07-09. Bose Polaron in a quantum fluid of light. https://doi.org/10.21468/scipostphys.12.1.008

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