Session L36 - General Poster Session II.
POSTER session, Wednesday morning, March 22
Exhibit Hall, MCC
Using a path-integral approach, we develop a self-consistent theory of excitations at finite temperature for dilute Bose gases. The use of pairing fields \langle \psi \psi \rangle, \langle\psi^\psi \rangle ensures validity in a broader temperature range than the traditional condensate-wavefunction approach can offer. We derive Bogoliubov equations, dispersion relations and critical temperatures for both homogeneous and trapped systems.