Collective Excitations of a Degenerate Gas at the BEC-BCS Crossover
Collective Excitations of a Degenerate Gas at the BEC-BCS Crossover
We study collective excitation modes of a fermionic gas of (6)Li atoms in the BEC-BCS crossover regime. While measurements of the axial compression mode in the cigar-shaped trap close to a Feshbach resonance confirm theoretical expectations, the radial compression mode shows surprising features. In the strongly interacting molecular BEC regime, …