自旋相干态法研究自旋轨道耦合BEC系统的基态性质  

Studying the Ground-State Properties of the Spin-Orbit-Coupled BEC by Means of the Spin Coherent-State Transformation

作　　者：赵佳[1] 

机构地区：[1]太原工业学院理学系,山西太原030008

出　　处：《太原师范学院学报（自然科学版）》2015年第4期4-7,共4页Journal of Taiyuan Normal University:Natural Science Edition

摘　　要：文章采用自旋相干态的方法研究自旋轨道耦合玻色爱因斯坦凝聚(BEC)系统的基态性质,在自旋相干态表象下把系统的哈密顿量对角化,由变分法求出系统的基态能谱、原子布居数和光子数,从而得到系统的量子相变,与Holstein-Primakoff方法所得的结果一致.We study the ground-state characteristics of the spin-orbit-coupled BEC by means of the spin coherent-state transformation. In the picture of the spin coherent-state, the Hamiltonian of the spin-Orbit-coupled BEC can be diagonalized by the spin coherent-state trans- formation. Based on the variational method we are able to obtain the expression of the ground- state energy spectra, the atomic population and the photon number. Consequently, The quantum phase transition is detected by these physical quantities, the same results are exactly obtained by using the Holstein-Primakoff approach.

关 键 词：自旋相干态 自旋轨道耦合 能谱 原子布居数 光子数 

分 类 号：O175[理学—数学]