Unconventional Berezinskii-Kosterlitz-Thouless Transition in the Multicomponent Polariton System

Abstract

We study a four-component polariton system in the optical parametric oscillator regime consisting of exciton/photon and signal/idler modes across the Berezinskii-Kosterlitz-Thouless (BKT) transition. We show that all four components share the same BKT critical point, and algebraic decay of spatial coherence with the same critical exponent. However, while the collective excitations in different components are strongly locked, both close to and far from criticality, the spontaneous creation of topological defects in the vicinity of the phase transition is found to be largely independent of the inter-component mode locking, and instead strongly dependent on the density within a given mode. This peculiar characteristic allows us to reveal a novel state of matter, characterised by configurations of topological defects proliferating on top of a superfluid with algebraic decay of coherence, observation of which is demonstrated to be within reach of current experiments.

6 pages, 5 figures, plus supplementary material

References in corpus (7)

• Quantum fluids of light
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• Polariton condensation with localised excitons and propagating photons
• Spontaneous microcavity-polariton coherence across the parametric threshold: Quantum Monte Carlo studies
• Connecting Berezinskii-Kosterlitz-Thouless and BEC phase transitions by tuning interactions in a trapped gas
• Non-equilibrium Berezinskii-Kosterlitz-Thouless transition in driven-dissipative condensates
• Searching for the Kardar-Parisi-Zhang phase in microcavity polaritons

Cited by in corpus (5)

• Universality in driven open quantum matter
• Quantum Quench Dynamics of Geometrically Frustrated Ising Models
• Berezinskii-Kosterlitz-Thouless phase transition with Rabi-coupled bosons
• Full and fractional defects across the Berezinskii-Kosterlitz-Thouless transition in a driven-dissipative spinor quantum fluid
• Noise-induced transition from superfluid to vortex state in two-dimensional nonequilibrium polariton condensates -- semi-analytical treatment