Three-dimensional quantum phase diagram of the exact ground states of a mixture of two species of spin-1 Bose gases with interspecies spin exchange
arXiv:1103.1023 · doi:10.1103/PhysRevA.83.013616
Abstract
We find nearly all the exact ground states of a mixture of two species of spin-1 atoms with both interspecies and intraspecies spin exchanges in absence of a magnetic field. The quantum phase diagram in the three-dimensional parameter space and its two-dimensional cross sections are described. The boundaries where the ground states are either continuous or discontinuous are determined, with the latter identified as where quantum phase transitions take place. The two species are always disentangled if the interspecies spin coupling is ferromagnetic or zero. Quantum phase transitions occur when the interspecies spin coupling varies between antiferromagtic and zero or ferromagnetic while the two intraspecies spin couplings both remain ferromagnetic. On the other hand, by tuning the interspecies spin coupling from zero to antiferromagnetic and then back to zero, one can circumvent the quantum phase transition due to sign change of the intraspecies spin coupling of a single species, which is spin-decoupled with the other species with ferromagnetic intraspecies spin coupling. Overall speaking, interplay among interspecies and two intraspecies spin exchanges significantly enriches quantum phases of spinor atomic gases.
arXiv comment16 pages, received by PRA on 23 August 2010
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Cited by in corpus (11)
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- Quantum entangled ground states of two spinor Bose-Einstein condensates
- Ground states of a mixture of two species of spin-1 Bose gases with interspecies spin exchange in a magnetic field
- Two types of phase diagrams for two-species Bose-Einstein condensates
- Resonant Spin Exchange between Heteronuclear Atoms Assisted by Periodic Driving
- Variation of the spin textures of 2-species spin-1 condensates studied beyond the single spatial mode approximation and the experimental identification of these textures
- Correlated spontaneous symmetry breaking induced by zero-point fluctuations in a quantum mixture
- Fragmentation of a spin-1 mixture in a magnetic field
- Phase separation and metastability in a mixture of spin-1 and spin-2 Bose-Einstein condensates
- Evaluation of the particle numbers via the two root mean square radii in a 2-species Bose-Einstein condensate
- Spin-textures of the Bose-Einstein condensates with three kinds of spin-1 atoms