https://doi.org/10.1140/epjd/e2003-00312-5
Optical operation of ultracold atomic quasi-clusters
Department of Physics, Hunan Normal University, Changsha
410081, P.R. China
Corresponding author: a adcve@cs.hn.cn
Received:
6
October
2002
Revised:
3
February
2003
Published online:
16
December
2003
We report several exact solutions of a two-dimensional (2D) Gross-Pitaevskii equation with an optical lattice potential, which describe the motion of an array of ultracold atomic quasi-clusters in a Bose-Einstein condensate. The velocity of the atomic quasi-clusters can be controlled by adjusting the optical potential strength so that one can stop or drive them by the optical brake. The atomic quasi-clusters form a superfluid for the propagation state or a critical insulator for the non-propagation one, and the brake and drive are associated with the quantum phase transitions between the insulator and superfluid. Other topics in quantum fluids and solids; liquid and solid helium
PACS: 03.75.-b – Matter waves / 05.70.Jk – Critical point phenomena / 05.30.Jp – Boson systems / – 67.90.+z
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
