Stochastic motion of finite-size immiscible impurities in a dilute quantum fluid at finite temperature
Umberto Giuriato,
Giorgio Krstulovic
Abstract:The dynamics of an active, finite-size and immiscible impurity in a dilute quantum fluid at finite temperature is characterized by means of numerical simulations of the projected Gross-Pitaevskii equation. The impurity is modeled as a localized repulsive potential and described with classical degrees of freedom. It is shown that impurities of different sizes thermalize with the fluid and undergo a stochastic dynamics compatible with an Ornstein-Uhlenbeck process at sufficiently large time-lags. The velocity co… Show more
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