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arXiv 0906.2174cond-mat.quant-gascond-mat.stat-mech
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偶极玻色-爱因斯坦凝聚体的角坍缩

Angular collapse of dipolar Bose-Einstein condensates

Ryan M. Wilson, Shai Ronen, John L. Bohn

摘要:

我们探讨了偶极玻色-爱因斯坦凝聚体(DBECs)的结构和动力学的不稳定性阈值附近。在这个阈值附近,DBEC可能表现出非平凡的,双凹的密度分布,这与不稳定性对崩溃成“角旋转”模式。在这里,我们讨论这些新功能的实验签名。首先,我们从实验稳定性图中推断出DBEC的局部坍塌。在第二,我们探讨了崩溃的动力学,并发现一个非平凡的角分布是一个签名的DBEC具有双凹结构。

英文摘要:

We explore the structure and dynamics of dipolar Bose-Einstein condensates (DBECs) near their threshold for instability. Near this threshold a DBEC may exhibit nontrivial, biconcave density distributions, which are associated with instability against collapse into "angular roton" modes. Here we discuss experimental signatures of these novel features. In the first, we infer local collapse of the DBEC from the experimental stability diagram. In the second, we explore the dynamics of collapse and find that a nontrivial angular distribution is a signature of the DBEC possessing a biconcave structure.

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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