2008/02/29 by Ming-Chiang Chung, M. -C. Chung, Aranya B. Bhattacherjee +1 · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Bose gas #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Component (thermodynamics) #Condensed matter physics #Materials science #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Separation (statistics) #Spin (aerodynamics) #Structure factor #Thermodynamics #cond-mat.other
paper · pdf · doi:10.1103/physrevlett.101.070402
4 pages, 2 figures
arxiv created 2008/07/04 · openalex publication_date 2008/08/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that spin-density separation in a Bose gas is not restricted to 1D but also occurs in higher dimensions. The ratio (alpha) of the intraspecies atom-atom interaction strength to the interspecies interaction strength strongly influences the dynamics of spin-density separation and the elementary excitations. The density wave is phononlike for all values of alpha. For alpha < 1, the spin wave is also phononlike. The spin waves have a quadratic dispersion in the alpha=1 coupling regime, while in the phase separated regime (alpha > 1) the spin waves are found to be damped. The dynamical structure factor reveals two distinct peaks corresponding to the density and spin waves for alpha < or =1. For alpha > 1 there is only one dynamical structure factor peak corresponding to the density wave.