Observations on Sound Propagation in Rapidly Rotating Bose-Einstein Condensates
T. P. Simula, P. Engels, I. Coddington, V. Schweikhard, E. A. Cornell, R. J. Ballagh
Abstract
Repulsive laser potential pulses applied to vortex lattices of rapidly rotating Bose-Einstein condensates create propagating density waves which we have observed experimentally and modeled computationally to high accuracy. We have observed a rich variety of dynamical phenomena ranging from interference effects and shock-wave formation to anisotropic sound propagation.
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