宽带压缩真空下运动梯形三能级原子的稳态布居  

Steady-State Population of a Moving Ladder-Type Three-Level Atom in Broad-Band Squeezed Vacuum

作　　者：袁海良[1] 

机构地区：[1]青海师范大学物理系,青海西宁810008

出　　处：《青海师范大学学报（自然科学版）》2006年第2期25-30,共6页Journal of Qinghai Normal University(Natural Science Edition)

摘　　要：本文主要研究了宽带压缩真空下,激光场驱动的梯形三能级原子的稳态布居.我们从系统的哈密顿量出发,利用波恩—马尔科夫近似,推导出了主方程,进而得到原子的光学布洛赫方程.对这个方程我们用数值计算的方法得出了其稳态解,通过图示法详细讨论了粒子布居iσi随拉比频率ε、双光子失谐Δ、相位、光场的平均粒子数N等参量的变化情况.This paper mainly deals with the steady - state population of a moving ladder-type three-level atom, driven by a superposition of a monochromatic laser wave with a broad-band squeezed vacuum, From the Hamiltonian of the atomic system,making use of Bom-Markoff approximation, we derive the master equation for the system and the atomic Bloch equations and obtain the steady - state solutions of the optical Bloch equations using numerical calculation. Then we discuss the dependence of the attained population σü on parameters such as detuning △, Rabi frequencies ε1ε2, phaseφ , squeezing photon number N and spontaneous decay ratesγ1 γ2 etc in different cases by using graphical method.

关 键 词：宽带压缩真空 梯形三能级原子 稳态布居 单光子共振 双光子共振 

分 类 号：O551.3[理学—热学与物质分子运动论]