Session A2 - Degenerate Gases.
INVITED session, Monday morning, March 22
517B, Palais des Congres
Dilute gases interacting via a Feshbach resonance can be strongly correlated. Under certain resonant conditions, such gases are predicted to show universal behaviour in the sense that only the density and the temperature determine their thermodynamics. To examine this effect, we develop a low-energy effective theory in which the parameters that enter are an atom-molecule coupling strength and the magnetic moment of the molecular resonance. Using this theory, we demonstrate under which conditions strongly correlated dilute gases can exhibit universal behaviour and we relate our results to the experimentally relevant fermionic systems ^6Li and ^40K.