密度矩阵与线性谐振子

THE DENSITY MATRIX AND LINEAR HARMONIC OSCILLATOR

讨论了在能量表象中怎样用密度矩阵来处理谐振子问题，再将它变换到坐标与动量表象中讨论其分布函数，获得满意的结果．与在坐标表象中用密度矩阵处理谐振子问题相比较［１］，具有计算简便、物理概念清晰之特点．

It is successfully discussed how to apply the density matrix.method to study propeties of ersonators under the energy representation The conclusions obtained under the energy representaion can be further transformed to those under the coordination representation and to those under the momentum representation.It is found that to study properties of resonators, calculations are more simple and physical ideas are more clear in using the density matrix method under the energy representaion than those under the coordination representation.