Structure and Stability of Vortices in Dilute Bose-Einstein Condensates at Ultralow Temperatures
arXiv:cond-mat/0102035 · doi:10.1103/PhysRevLett.86.2704
Abstract
We compute the structure of a quantized vortex line in a harmonically trapped dilute atomic Bose-Einstein condensate using the Popov version of the Hartree-Fock-Bogoliubov mean-field theory. The vortex is shown to be (meta)stable in a nonrotating trap even in the zero-temperature limit, thus confirming that weak particle interactions induce the condensed gas a fundamental property characterizing ``classical'' superfluids. We present the structure of the vortex at ultralow temperatures and discuss the crucial effect of the thermal gas component to its energetic stability.
4 pages, 4 figures, accepted for publication in Phys. Rev. Lett
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