Spectroscopic method to measure the superfluid fraction of an ultracold atomic gas
Spectroscopic method to measure the superfluid fraction of an ultracold atomic gas
We perform detailed analytical and numerical studies of a recently proposed method for a spectroscopic measurement of the superfluid fraction of an ultracold atomic gas [N. R. Cooper and Z. Hadzibabic, Phys. Rev. Lett. 104, 030401 (2010)]. Previous theoretical work is extended by explicitly including the effects of nonzero temperature …