Compared with earlier unrestricted Hartree-Fock studies, it is shown that a three-parameter variational wave function is an excellent representation of true ground state.

• 分别利用微扰法、精确对角化方法和变分法，计算双电子平面量子点的基态能量，与早期的无约束哈特利-福克研究结果比较，发现三参量的变分波函数是基态的极好表征。