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arXiv · 1903.09229

Oscillations and decay of superfluid currents in a one-dimensional Bose gas on a ring

Juan Polo·Romain Dubessy·Paolo Pedri·Helene Perrin·Anna Minguzzi
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Abstract

We study the time evolution of a supercurrent imprinted on a one-dimensional ring of interacting bosons in the presence of a defect created by a localized barrier. Depending on interaction strength and temperature, we identify various dynamical regimes where the current oscillates, is self-trapped or decays with time. We show that the dynamics are captured by a dual Josephson model and involve phase slips of thermal or quantum nature.

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Juan Polo, Romain Dubessy, Paolo Pedri, Helene Perrin, Anna Minguzzi. 2019-03-21. Oscillations and decay of superfluid currents in a one-dimensional Bose gas on a ring. https://doi.org/10.1103/physrevlett.123.195301

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