压缩真空中梯形三能级原子的辐射压力

研究了压缩真空中梯形三能级原子在单色行波场中的辐射压力。从系统的哈密顿量出发，利用玻因-马尔可夫近似，推导出了原子的光学布洛赫方程。此时用数值方法求得布洛赫方程的稳态解，然后用图示法考察了原子的辐射压力随双光子失谐、拉比频率、自发发射率等参量的依赖关系。结果表明：单光子跃迁和双光子跃迁可导致辐射压力出现各自的多普勒位移共振峰；辐射压力表现出较宽的失谐范围且强烈依赖于压缩参量以及压缩真空和相干光之间的相位关系。当相位满足匹配条件时，辐射压力减小。

Radiation Pressure on a Ladder-Type Three-Level Atom in a Squeezed Vacuum

The Radiation pressure of a moving ladder-type three-level atom in a squeezed vacuum is discussed. From the Hamiltonian of the atomic system, making use of Born-Markoff approximation, the optical Bloch equations are derived. As the time scales for the evolution of internal and external degrees of freedom are highly distinct, the steady-state solutions of the optical Bloch equations can be obtained using numerical calculation, Then the graphical method is used to discuss the dependence of the force on various parameters such as two-photon detuning, Rabi frequencies and spontaneous emissions. The result shows that the radiation pressure shows Doppler-shifted resonance peaks resulting respectively from one-photon and two-photon transitions, and the radiation pressure depends strongly on the relative phase of the driving field and the squeezed vacuum, When the phase matching condition is fulfilled, the dissipative force will be diminished.