Observation of strong quantum depletion in a gaseous Bose-Einstein condensate.
We studied quantum depletion in a gaseous Bose-Einstein condensate. An optical lattice enhanced the atomic interactions and modified the dispersion relation resulting in strong quantum depletion. The depleted fraction was directly observed as a diffuse background in the time-of-flight images. Bogoliubov theory provides a semiquantitative description for our observations of depleted fractions in excess of 50%.
Xu
K
K
Department of Physics, MIT-Harvard Center for Ultracold Atoms and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. kwxu@mit.edu
Liu
Y
Y
Miller
D E
DE
Chin
J K
JK
Setiawan
W
W
Ketterle
W
W