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Temperature dependence of the energy of a vortex in a two-dimensional Bose gas | | K.K. Rajagopal
; B. Tanatar
; P. Vignolo
; M.P. Tosi
; | | Date: |
30 Aug 2004 | | Journal: | Phys. Lett. A 328 (2004) 500 DOI: 10.1016/j.physleta.2004.06.068 | | Subject: | Other | cond-mat.other | | Affiliation: | SNS Italy, Bilkent University | | 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. | | Source: | arXiv, cond-mat/0408652 | | Services: | Forum | Review | PDF | Favorites | |
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