Two-component condensates: The role of temperature

A two-component condensate situated in a cylindrically symmetric harmonic trap is investigated using the Popov approximation. The thermal clouds are treated semiclassically, which allows studies of big condensates at high temperatures. We study the influence of the thermal parts on the condensate stability properties. The results are compared with zero-temperature calculations obtained by the Gross-Pitaevskii equations. In the strongly interacting situation, the thermal parts were found to play an important role for the stability properties of the condensates.