Equilibrium vortex formation in ultrarapidly rotating two-component Bose-Einstein condensates

C. H. Hsueh, T. L. Horng, S. C. Gou, W. C. Wu

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Equilibrium vortex formation in rotating binary Bose gases with a rotating frequency higher than the harmonic trapping frequency is investigated theoretically. We consider the system being evaporatively cooled to form condensates and a combined numerical scheme is applied to ensure the binary system being in an authentic equilibrium state. To keep the system stable against the large centrifugal force of ultrafast rotation, a quartic trapping potential is added to the existing harmonic part. Using the Thomas-Fermi approximation, a critical rotating frequency Ωc is derived, which characterizes the structure with or without a central density hole. Vortex structures are studied in detail with rotation frequency both above and below Ωc and with respect to the miscible, symmetrically separated, and asymmetrically separated phases in their nonrotating ground-state counterparts.

Original languageEnglish
Article number023610
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume84
Issue number2
DOIs
Publication statusPublished - 2011 Aug 5

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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