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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
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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.

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K. K. Rajagopal, B. Tanatar, P. Vignolo, M. P. Tosi. 2004-08-30. Temperature dependence of the energy of a vortex in a two-dimensional Bose gas. https://doi.org/10.1016/j.physleta.2004.06.068

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