2012/01/31 by Xiaoqiang Xu, Xiao-Qiang Xu, Jung Hoon Han · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Ferromagnetism #Hamiltonian (control theory) #Magnetism #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Rashba effect #Spin (aerodynamics) #Spinor #Spintronics #Superfluidity #cond-mat.quant-gas
paper · pdf · doi:10.1103/physrevlett.108.185301
published as Phys. Rev. Lett. 108, 185301 (2012) · 4.2 pages, 1 figure, accepted for publication in PRL
arxiv created 2012/03/13 · openalex publication_date 2012/04/30 · arxiv updated 2012/05/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Hydrodynamic theory of the spinor BEC condensate with Rashba spin-orbit coupling is presented. A close mathematical analogy of the Rashba-Bose-Einstein condensate model to the recently developed theory of chiral magnetism is found. Hydrodynamic equations for mass density, superfluid velocity, and the local magnetization are derived. The mass current is shown to contain an extra term proportional to the magnetization direction, as a result of the Rashba coupling. Elementary excitations around the two known ground states of the Rashba-Bose-Einstein condensate Hamiltonian, the plane-wave, and the stripe states, are worked out in the hydrodynamic framework, highlighting the cross coupling of spin and superflow velocity excitations due to the Rashba term.