【摘要】 使用微扰法计算由一维线性谐振子势和光晶格势叠加的复合势阱中的玻色-爱因斯坦凝聚体的基态.将系统的动能项作为微扰项,研究了动能项对凝聚体基态能量的粒子数几率密度分布的影响,以及复合势阱对几率密度分布的影响.得出微扰法计算凝聚体基态的具体适用范围.更多还原

【Abstract】 Using the perturbation theory,we solve the ground state of Bose-Einstein condensate in composite potential trap,which is composed of one-dimensional linear harmonic oscillator potential and optical lattice potential.We treat the kinetic energy of particles in composite potential trap as a perturbation and analyse the effect of kinetic term as well as composite potential trap on probability density distribution of particles in ground state of condensate.In the end,we infer the main field of application of perturbation theory.更多还原