Temperature dependence of the energy of a vortex in a two-dimensional Bose gas
arXiv:cond-mat/0408652 · doi:10.1016/j.physleta.2004.06.068
Abstract
We evaluate the thermodynamic critical angular velocity Omega_c(T) for creation of a vortex of lowest quantized angular momentum in a strictly two-dimensional Bose gas at temperature T, using a mean-field two-fluid model for the condensate and the thermal cloud. Our results show that (i) a Thomas-Fermi description of the condensate badly fails in predicting the particle density profiles and the energy of the vortex as functions of T; and (ii) an extrapolation of a simple Thomas-Fermi formula for Omega_c(0) is nevertheless approximately useful up to T = 0.5 T_c.
arXiv comment9 pages, 4 figures
References in corpus (12)
- Vortex formation in a stirred Bose-Einstein condensate
- Realization of Bose-Einstein condensates in lower dimensions
- Ground-State Properties of Magnetically Trapped Bose-Condensed Rubidium Gas
- Critical Point of a Weakly Interacting Two-Dimensional Bose Gas
- Bose-Einstein condensates with vortices in rotating traps
- Dynamics of a single vortex line in a Bose-Einstein condensate
- Low-dimensional Bose gases
- Vortices in Bose-Einstein-Condensed Atomic Clouds
- Free expansion of Bose-Einstein condensates with quantized vortices
- Internal energy and condensate fraction of a trapped interacting Bose gas
- Vortex phase diagram in trapped Bose-Einstein condensation
- Density profile of a strictly two-dimensional Bose gas at finite temperature