报告题目: |
Self-bound droplets of a dipolar Bose-Einstein condensate:stabilized by the Lee-Huang-Yang corrections |
报告人: |
Blair Blakie |
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University of Otago, New Zealand
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报告时间: |
2017-05-08 16:00 |
报告地点: |
Conference Hall 322, Science Building, Tsinghua University |
主办单位: |
高等研究院 |
简介: |
Recent experiments with Bose-Einstein condensates of dysprosium and erbium atoms have observed the formation of droplets that can preserve their form, even in the absence of any external confinement [1]. These droplets occur in the regime where the long-ranged dipole-dipole interaction between the atoms dominates over the short-ranged contact interaction. In this regime meanfield theory predicts that the condensate is unstable to collapse. However, as the collapse begins, and the density increases, the Lee-Huang-Yang corrections to meanfield energy [2] become important and stabilizes the system as a finite sized droplet. I will discuss our recent theoretical work predicting the existence and properties of self-bound droplets [3] and their excitations [4].
[1] M. Schmitt, M. Wenzel, F. Bottcher, I. Ferrier-Barbut, and T. Pfau, Nature 539, 259 (2016).
[2] T. D. Lee, K. Huang, and C. N. Yang, Phys. Rev. 106, 1135 (1957)
[3] D. Baillie, R. M. Wilson, R. N. Bisset, and P. B. Blakie, Phys. Rev. A 94, 021602(R) (2016).
[4] D. Baillie, R. M. Wilson, P. B. Blakie, arXiv:1703.07927 |
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