Derivation of hydrodynamics for the gapless mode in the BEC-BCS crossover from the exact one-loop effective action.
We derive generalized two-superfluid continuity equations for the BEC-BCS crossover in the presence of a Feshbach resonance at T=0. In addition, we calculate the velocity of sound throughout both BCS and Bose-Einstein condensation (BEC) regimes.
Lee
Da-Shin
DS
Department of Physics, National Dong Hwa University, Hua-Lien, Taiwan 974, Republic of China.
Lin
Chi-Yong
CY
Rivers
Ray J
RJ