Fragmentation of spinorbitcoupled spinor BoseEinstein condensates
Abstract
The fragmentation of spinorbitcoupled spin1 Bose gas with a weak interaction in external harmonic trap is explored by both exact diagonalization and meanfield theory. This fragmentation tendency, which originates from the total angular momentum conservation, is affected obviously by the spinorbitcoupling strength and the spindependent interaction. Strong spinorbit interaction raises the inverse participation ratio, which describes the number of significantly occupied singleparticle states. As the spindependent interaction changes from antiferromagnetic to ferromagnetic, the peak values in the inverse participation ratio become lower. Without the confinement of the appointed total angular momentum, the condensate chooses a zero or finite total angular momentum ground state, which is determined by both the interaction and the spinorbitcoupling strength.
 Publication:

Physical Review A
 Pub Date:
 June 2014
 DOI:
 10.1103/PhysRevA.89.063613
 arXiv:
 arXiv:1405.5708
 Bibcode:
 2014PhRvA..89f3613S
 Keywords:

 03.75.Mn;
 05.30.Jp;
 67.85.Fg;
 67.85.Jk;
 Multicomponent condensates;
 spinor condensates;
 Boson systems;
 Other BoseEinstein condensation phenomena;
 Condensed Matter  Quantum Gases
 EPrint:
 7pages,8figures