Matter sound waves in two-component Bose-Einstein condensates

Details Matter sound waves in two-component Bose-Einstein condensates Matter sound waves in two-component Bose-Einstein condensates

2008-08-05

arxiv.org/abs/0808.0612v1

J. Phys. B: At. Mol. Opt. Phys. 41, 215302 (2008)

Physics

Condensed Matter

Other Condensed Matter

16 pages, 9 figures

Scientific paper

10.1088/0953-4075/41/21/215302

The creation and propagation of sound waves in two-component Bose-Einstein condensates (BEC) are investigated and a new method of wave generation in binary BEC mixtures is proposed. The method is based on a fast change of the inter-species interaction constant and is illustrated for two experimental settings: a drop-like condensate immersed into a second large repulsive condensate, and a binary mixture of two homogeneous repulsive BEC's. A mathematical model based on the linearized coupled Gross-Pitaevskii equations is developed and explicit formulae for the space and time dependence of sound waves are provided. Comparison of the analytical and numerical results shows excellent agreement, confirming the validity of the proposed approach.

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