Equilibrium vortex formation in ultrarapidly rotating two-component Bose-Einstein condensates
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 \Omega_c 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 ?\Omega_c and with respect to the miscible, symmetrically separated, and asymmetrically separated phases in their nonrotating ground-state counterparts.
Cite
@article{arxiv.1109.5496,
title = {Equilibrium vortex formation in ultrarapidly rotating two-component Bose-Einstein condensates},
author = {C. -H. Hsueh and T. -L. Horng and S. -C. Gou and W. C. Wu},
journal= {arXiv preprint arXiv:1109.5496},
year = {2015}
}
Comments
7 pages, 7 figures