摘要
The precision measurements of the vortex-lattice spacing and vortex-core size over a range of condensate densities and rotation rates were performed by numerical simulations. A measurement of the contrast of vortex cores serves as a sensitive thermometer for a condensate in the regime for which the temperature was less than the chemical potential. It was observed that the spatial extent of the thermal cloud was no longer larger than the condensate, when the temperature becomes lower than or comparable to the chemical potential of the self-interacting condensate. The effect of the centrifugal weakening of the trapping spring constants on the critical temperature for quantum degeneracy was discussed.