宽带压缩真空下运动梯型三能级原子的辐射压力

Radiation Pressure of a Moving Ladder-Type Three-Level Atom in Broad-Band Squeezed Vacuum

主要研究了宽带压缩真空下,双色驱动激光场对运动梯型三能级原子的辐射压力及其稳态表达式。从宽带压缩真空下,双色激光场对运动梯型三能级原子的驱动的主方程出发,得到了原子密度矩阵元!ij的布洛赫方程;利用合适的标度化变量,得到了关于原子布居的布洛赫方程,再由原子动量的海森堡运动方程,利用绝热近似重要条件,得出平圴辐射压力的表达式;考虑到稳态下,原子布居数不随时间变化以及"11+"22+"33=1的条件,得出原子的辐射压力的稳态表达式。

This paper mainly studies the radiation pressure of a moving ladder-type three-level atom driven by a superposition ofa bichromatic laser wave with a broad-band squeezed vaccum and obtains the steady-state expression for the radiation force. Frist, from the master equations for a moving ladder-type three-level atom driven by a superposition of a bichromatic laser wave with a broad-band squeezed vaccum, we derive the equations for the atomic density matrix element. Second, by choosing proper scaled variables, Bloch equations for the atomic population are obtained. Then, from Heisenberg equation for atomic momentum, considering the adiabatic approximation,the mathematical expression of the mean radiation pressure is obtained. At last, by considering the steady-state case in which the atomic population doesn＇t vary with time and the condition, the steady-state expression of the radiation pressure is obtained.