Structure and stability of vortices in dilute Bose-Einstein condensates at ultralow temperatures

S. M M Virtanen, T. P. Simula, M. M. Salomaa

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The structure of a cylindrically trapped, dilute atomic Bose-Einstein condensate penetrated by a vortex line was computed within self-consistent mean-field theories. It was found that the vortex state is locally energetically stable in a nonrotating system even in the zero-temperature limit. The thermal gas concentrated in the vortex core exhibited a crucial effect in stabilizing the vortex state even at ultralow temperatures, due to a residual noncondensate fraction present in interacting systems in the zero-temperature limit.

Original languageEnglish
Pages (from-to)2704-2707
Number of pages4
JournalPhysical Review Letters
Issue number13
Publication statusPublished - 26 Mar 2001
Externally publishedYes

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