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arXiv 0907.3989cond-mat.quant-gas
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大玻色-爱因斯坦凝聚体中shock waves的观测

Observation of shock waves in a large Bose-Einstein condensate

R. Meppelink, S. B. Koller, J. M. Vogels, P. van der Straten, E. D. van Ooijen, N. R. Heckenberg, H. Rubinsztein-Dunlop, S. A. Haine, M. J. Davis

摘要:

我们观察到含有大量钠原子的玻色-爱因斯坦凝聚体中激波的形成。冲击波是由一个排斥的蓝失谐光垒引发的,与BEC相交,之后出现两个冲击波阵面。当这些波的大小接近凝聚体的愈合长度时,我们观察到这些波的破碎。此时,波前分裂成两部分,出现清晰的条纹。实验建模使用一个有效的1D Gross-Pitaevskii方程,并给出了良好的定量协议与实验,即使物质波的波长小于两个数量级的愈合长度存在。在这些实验中,没有观察到显著的加热或颗粒损失。

英文摘要:

We observe the formation of shock waves in a Bose-Einstein condensate containing a large number of sodium atoms. The shock wave is initiated with a repulsive, blue-detuned light barrier, intersecting the BEC, after which two shock fronts appear. We observe breaking of these waves when the size of these waves approaches the healing length of the condensate. At this time, the wave front splits into two parts and clear fringes appear. The experiment is modeled using an effective 1D Gross-Pitaevskii-like equation and gives excellent quantitative agreement with the experiment, even though matter waves with wavelengths two orders of magnitude smaller than the healing length are present. In these experiments, no significant heating or particle loss is observed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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