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Quantum Spin Dynamics in Spin-orbit Coupled Bose Gas

Wai Ho Tang, Shizhong Zhang

Bulletin of the American Physical SocietyMar 6, 20180 citations

Two-dimensional quasi-ideal Fermi gas with Rashba spin-orbit coupling

Luca Salasnich

We investigate the zero-temperature properties of a quasi-ideal Fermi gas with Rashba spin-orbit coupling. We find that the spin-orbit term strongly affects the speeds of zero sound and first sound in the Fermi gas, due to the presence of a third-order quantum phase transition. In addition, including a two-dimensional harmonic confinement, we show that also the shape of the density profile of the cloud crucially depends on the strength of the Rashba coupling.

arXiv:1311.4080Physical Review ANov 27, 20135 citations

Spin-orbit coupling in a Bose-Fermi spinor Mixture

Chuanzhou Zhu, Li Chen, Hui Hu +2 more

Bulletin of the American Physical SocietyMay 29, 20190 citations

Ground State of Bosons in Bose–Fermi Mixture with Spin–Orbit Coupling

Ryohei Sakamoto, Yosuke Ono, Rei Hatsuda +3 more

We study an effect of spin-1/2 fermions on the ground state of a Bose system with equal Rashba and Dresselhaus spin–orbit coupling. By using mean-field and tight-binding approximations, we show the ground state phase diagram of the Bose system in the spin–orbit coupled Bose–Fermi mixture and find that the characteristic phase domain, where a spin current of fermions may be induced, can exist even in the presence of a significantly large number of fermions.

Journal of the Physical Society of JapanJun 16, 20172 citations

Spin Transport in Spin Orbit Coupled Bose Einstein Condensates

Robert Niffenegger, Abraham J. Olson, Chuan-Hsun Li +1 more

Bulletin of the American Physical SocietyMar 6, 20140 citations

BCS-BEC Crossover in 2D Fermi Gases with Rashba Spin-Orbit Coupling

Lianyi He, Xu-Guang Huang

We present a systematic theoretical study of the BCS-BEC crossover in two-dimensional Fermi gases with Rashba spin-orbit coupling (SOC). By solving the exact two-body problem in the presence of an attractive short-range interaction we show that the SOC enhances the formation of the bound state: the binding energy E(B) and effective mass m(B) of the bound state grows along with the increase of the SOC. For the many-body problem, even at weak attraction, a dilute Fermi gas can evolve from a BCS superfluid state to a Bose condensation of molecules when the SOC becomes comparable to the Fermi momentum. The ground-state properties and the Berezinskii-Kosterlitz-Thouless (BKT) transition temperature are studied, and analytical results are obtained in various limits. For large SOC, the BKT transition temperature recovers that for a Bose gas with an effective mass m(B). We find that the condensate and superfluid densities have distinct behaviors in the presence of SOC: the condensate density is generally enhanced by the SOC due to the increase of the molecule binding; the superfluid density is suppressed because of the nontrivial molecule effective mass m(B).We present a systematic theoretical study of the BCS-BEC crossover in two-dimensional Fermi gases with Rashba spin-orbit coupling (SOC). By solving the exact two-body problem in the presence of an attractive short-range interaction we show that the SOC enhances the formation of the bound state: the binding energy E(B) and effective mass m(B) of the bound state grows along with the increase of the SOC. For the many-body problem, even at weak attraction, a dilute Fermi gas can evolve from a BCS superfluid state to a Bose condensation of molecules when the SOC becomes comparable to the Fermi momentum. The ground-state properties and the Berezinskii-Kosterlitz-Thouless (BKT) transition temperature are studied, and analytical results are obtained in various limits. For large SOC, the BKT transition temperature recovers that for a Bose gas with an effective mass m(B). We find that the condensate and superfluid densities have distinct behaviors in the presence of SOC: the condensate density is generally enhanced by the SOC due to the increase of the molecule binding; the superfluid density is suppressed because of the nontrivial molecule effective mass m(B).

arXiv:1109.5577Physical Review LettersApr 3, 2012107 citations

Dynamical Spin Properties of Confined Fermi and Bose Systems in the Presence of Spin–Orbit Coupling

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