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.
Patankar,Numerical Heat Transfer and Fluid Flow, Series in computational methods in mechanics and thermal sciences (Taylor & Francis, 1980)
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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.