TY - JOUR
T1 - Equilibrium vortex formation in ultrarapidly rotating two-component Bose-Einstein condensates
AU - Hsueh, C. H.
AU - Horng, T. L.
AU - Gou, S. C.
AU - Wu, W. C.
PY - 2011/8/5
Y1 - 2011/8/5
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevA.84.023610
DO - 10.1103/PhysRevA.84.023610
M3 - Article
AN - SCOPUS:80051642402
SN - 1050-2947
VL - 84
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 2
M1 - 023610
ER -