Ground state properties of cold bosonic atoms at large scattering lengths.
In this Letter, we study bosonic atoms at large scattering lengths using a variational method where the condensate amplitude is a variational parameter. We further examine momentum distribution functions, chemical potentials, the speed of sound, and spatial density profiles of cold bosonic atoms in a trap in this limit. The latter two properties turn out to bear similarities to those of Fermi gases. The estimates obtained here are applicable near Feshbach resonances, particularly when the fraction of atoms forming three-body structures is small and can be tested in future cold atom experiments.
Song
Jun Liang
JL
Department of Physics and Astronomy, The University of British Columbia, Vancouver, B. C., Canada V6T1Z1.
Zhou
Fei
F