Universal shock-wave propagation in one-dimensional Bose fluids
Résumé
We propose a protocol for creating moving, long-lived shock waves in interacting one-dimensional Bose fluids. The fluid is prepared in a moving state by phase imprinting and sent against the walls of a box trap. We demonstrate that the shock wave front thus formed remains robust against dephasing and thermal fluctuations, over several oscillation periods. We show that this large amplitude dynamics is universal across the whole spectrum of the interatomic interaction strength, from weak to strong interactions, and it is fully controlled by the sound velocity inside the fluid. The shock waves we propose are within reach for ultracold atom experiments.
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