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Behaviour of Rotating Bose--Einstein Condensates Under Shrinking |
| ZHAI Hui;ZHOU Qi |
| Centre for Advanced Study, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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ZHAI Hui, ZHOU Qi 2005 Chin. Phys. Lett. 22 25-28 |
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Abstract When the repulsive interaction strength between atoms decreases, the size of a rotating Bose--Einstein condensate will consequently shrink. We find that the rotational frequency will increase during the shrinking of condensate, which is a quantum mechanical analogy to ballet dancing. Compared to a non-rotating condensate, the size of a rotating BEC will eventually be saturated at a finite value when the interaction strength is gradually reduced. We also calculate the vortex dynamics induced by the atomic current, and discuss the difference of vortex dynamics in this case and that observed in a recent experiment carried out by the JILA group [Phys. Rev. Lett. 90(2003)170405].
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| Keywords:
03.75.Lm
03.75.Kk
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Published: 01 January 2005
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| PACS: |
03.75.Lm
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(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
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03.75.Kk
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(Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)
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