Rajagopal, K. K.Tanatar, BilalVignolo, P.Tosi, M. P.2016-02-082016-02-0820040375-9601http://hdl.handle.net/11693/24242We evaluate the thermodynamic critical angular velocity Ωc(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 Ωc(0) is nevertheless approximately useful up to T≃0.5Tc.English03.75.Fi05.30.Jp32.80.PjBose gasesThomas-Fermi theoryVortex energyCloudDensityEnergyEvaluationGasLiquidParticulate matterPolymerizationPredictionTemperatureTemperature dependenceThermodynamicsVelocityVortex motionTemperature dependence of the energy of a vortex in a two-dimensional Bose gasArticle10.1016/j.physleta.2004.06.0681873-2429