Collective oscillations of a confined Bose gas at finite temperature in the random-phase approximation
Collective oscillations of a confined Bose gas at finite temperature in the random-phase approximation
We present a theory for the linear dynamics of a weakly interacting Bose gas confined inside a harmonic trap at finite temperature. The theory treats the motions of the condensate and of the noncondensate on an equal footing within a generalized random-phase approximation, which (i) extends the second-order Beliaev-Popov approach …