Polarized entangled Bose-Einstein condensation

Details Polarized entangled Bose-Einstein condensation Polarized entangled Bose-Einstein condensation

2011-03-05

arxiv.org/abs/1103.1021v1

Phys. Rev. A 82, 063637 (2010)

Physics

Condensed Matter

Quantum Gases

14 pages, received by PRA on 27 October 2010

Scientific paper

10.1103/PhysRevA.82.063637

We consider a mixture of two distinct species of atoms of pseudospin-1/2 with both intraspecies and Interspecies spin-exchange interactions, and find all the ground stats in a general case of the parameters in the effective Hamiltonian. In general, corresponding to the two species and two pseudo-spin states, there are four orbital wave functions into which the atoms condense. We find that in certain parameter regimes, the ground state is the so-called polarized entangled Bose-Einstein condensation, i.e. in addition to condensation of interspecies singlet pairs, there are unpaired atoms with spins polarized in the same direction. The interspecies entanglement and polarization significantly affect the generalized Gross-Pitaevskii equations governing the four orbital wave functions into which the atoms condense, as an interesting interplay between spin and orbital degrees of freedom.

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