Bose-Einstein condensation of an ideal gas in a parabolic trap

The temperature-dependent velocity distribution function is found for the case of Bose-Einstein condensation of a finite number of noninteracting atoms trapped in a three-dimensional anisotropic parabolic trap. It is shown that at a temperature T of the order of the condensation temperature T ₀ the velocity distribution consists of an anisotropic part, reflecting the population of the ground state, and an isotropic part above the condensate. Pis’ma Zh. éksp. Teor. Fiz. 66, No. 8, 559–563 (25 October 1997)