耗散腔中三能级原子偶极平方压缩

Atomic diople amplitude-squared squeezing of three-level atom in dissipative cavity

通过严格解主方程求出耗散腔中级联三能级原子密度矩阵,研究了初始处于真空耗散场中三能级原子偶极平方压缩效应.假设原子初始处于基态与最高激发态的相干叠加态,并在共振相互作用条件下,系统在演化过程中可以出现原子偶极平方压缩现象.结果表明,理想腔条件下压缩量呈现周期性变化,当存在耗散项时,腔耗对原子的压缩效应有显著削弱作用.

Atomic dipole square squeezing effects of a cascade three-level atom that is initially put in a vacuum dissipative cavity are investigated by means of exactly solving the master equation of the matrix elements of the density operator.Suppose that the atom is initially in a superposition of the most excited and ground states.Also,the resonant interaction is assumed.The dipole amplitude-squared squeezing effects in the process of interaction can be found.The squeezing quantities vary periodically in an ideal cavity,and field dissipation reduces the amount of amplitude-squared squeezing markedly in a lossy cavity.