Ground-state phase diagram and critical temperature of two-component Bose gases with Rashba spin-orbit coupling
arXiv:1304.2690 · doi:10.1103/PhysRevA.87.051606
Abstract
Ground-state phase diagram of two-component Bose gases with Rashba spin-orbit coupling is determined via a variational approach. A phase in which the fully polarized condensate occupies zero momentum is identified. This zero-momentum phase competes with the spin density wave phase when interspecies interaction is stronger than intraspecies interaction, and the former one is always the ground state for weak spin-orbit coupling. When the energies of these two phases are close, there is a phase separation between them. At finite temperature, such a zero-momentum condensation can be induced by a ferromagnetic phase transition in normal state. The spontaneous spin polarization removes the degeneracy of quasiparticles' energy minima, and consequently the modified density of state accommodates a Bose condensation to appear below a critical temperature.
5 pages, 3 figures, final version
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Cited by in corpus (12)
- Degenerate Quantum Gases with Spin-Orbit Coupling
- Dynamical generation of dark solitons in spin-orbit-coupled Bose-Einstein condensates
- Real space mean-field theory of a spin-1 Bose gas in synthetic dimensions
- Quantum and thermal fluctuations in a Raman spin-orbit coupled Bose gas
- Symmetry protected skyrmions in 3D spin-orbit coupled Bose gases
- Interaction driven exotic quantum phases in spin-orbit coupled spin bosons
- Influence of Rashba spin-orbit and Rabi couplings on the miscibility and ground state phases of binary Bose-Einstein condensates
- Spontaneous ferromagnetism in the spinor Bose gas with Rashba spin-orbit coupling
- Magnetic and nematic phases in a Weyl type spin-orbit-coupled spin-1 Bose gas
- Spin-orbit coupled mean-field Bose gas at finite temperature
- Effect of Rashba spin-orbit and Rabi couplings on the excitation spectrum of binary Bose-Einstein condensates
- Thermal Casimir effect in the spin-orbit coupled Bose gas