Direct measurement of static correlation length ξ and dynamical relaxation time τ in the disordered phase of a driven polariton fluid yields τ ∝ ξ^z with z ≈ 2, indicating diffusive dynamics of a non-conserved order parameter.
Stepanov,et al., Dispersion relation of the collective excitations in a resonantly driven polariton fluid.Nature communications10(1), 1–8 (2019)
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Dynamical universality in a driven quantum fluid of light
Direct measurement of static correlation length ξ and dynamical relaxation time τ in the disordered phase of a driven polariton fluid yields τ ∝ ξ^z with z ≈ 2, indicating diffusive dynamics of a non-conserved order parameter.