A driven impurity in a 1D weakly-interacting Bose gas exhibits periodic velocity oscillations around a drift velocity due to periodic emission of density shock waves, solitons and phase gradients, with oscillations ceasing at high forces.
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Bloch oscillations of a mobile impurity in a one-dimensional Bose gas
A driven impurity in a 1D weakly-interacting Bose gas exhibits periodic velocity oscillations around a drift velocity due to periodic emission of density shock waves, solitons and phase gradients, with oscillations ceasing at high forces.