原子与库场相互作用系统中密度矩阵主方程的解

Solution of Master Equation of Density Matrix in Interaction System of Atom with Thermal Reservoir

利用Ket-Bra纠缠态方法求解了原子与库场相互作用系统中的密度矩阵主方程,给出了解的解析表达式。研究了系统中原子的偶极压缩效应,讨论了库场平均光子数和原子自发辐射率对原子偶极压缩效应的影响。研究结果表明,随着自发辐射率和平均光子数的增大,原子偶极压缩效应减弱。

The master equation of density matrix in the interaction system of atom with thermal reservoir can be solved by virtue of the Ket-Bra entangled state method and the analytical solution expression is shown. Atomic dipole squeezing effect in this system is numerically studied and the effects of the mean number of photons in the thermal reservoir and the atomic spontaneous emission rate on the atomic dipole squeezing effect are discussed. The results show that the atomic dipole squeezing effect is weakened with the increase of the mean number of photons and the atomic spontaneous emission rate.