2008/08/05 by B. B. Baizakov, B B Baizakov, A. M. Kamchatnov +3
Physics and Astronomy · #Binary number #Cold Atom Physics and Bose-Einstein Condensates #Constant (computer programming) #Homogeneous #Quantum Electrodynamics and Casimir Effect #Second sound #Sound wave #Space (punctuation) #Strong Light-Matter Interactions #Wave propagation #cond-mat.other
paper · pdf · doi:10.1088/0953-4075/41/21/215302
published as J. Phys. B: At. Mol. Opt. Phys. 41, 215302 (2008) · 16 pages, 9 figures
arxiv created 2008/08/05 · openalex publication_date 2008/10/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.