旋量玻色—爱因斯坦凝聚体平均自旋在外场中的演化

Evolution of the average spin of spinor Bose-Einstein condensates in external fields

利用平均场理论和单空间模近似,研究了总自旋F=1的旋量玻色—爱因斯坦凝聚体的平均自旋在外磁场的演化行为.理论研究结果表明平均自旋演化行为与对称相互作用无关;当处于不同量子态的粒子数不随时间变化时,体系自旋的行为由外磁场、反对称相互作用决定.

Within the mean field approximation and the single mode approximation, the evolution of the average spin of the F = 1 spinor condensate in an external magnetic field was studies and the evolution was independent of the density-density collisional interaction. When the population in each quantum state was constant, the average spin was determined by the external magnetic field and the spin-spin collisional interaction.