基于绝热快速通道控制原子布居数及其相干性的研究

Control of population and atomic coherence by adiabatic rapid passage

本文在理论上研究了纳秒数量级内,运用绝热快速通道(ARP)来控制基态原子的相干性及其布居数在不同能态间的转移.理论计算结果表明抽运激光脉冲相对斯托克斯(Stokes)脉冲延迟时间的微小改变会导致原子相干性及其布居数的显著变化.运用密度矩阵方程和麦克斯韦方程联合的自洽方程数值解,我们找到了实现原子最大相干性及其布居数在不同能态间完全转移的条件.

Robust control of atomic coherence and population transfer among Zeeman sublevels in the ground states of atom is investigated theoretically using adiabatic rapid passage on a nanosecond time scale. It is shown that a slight change in the pump pulse time delay relative to the Stokes pulse leads to a significant modification of atomic coherence and population transfer. Ibis coherence control of quantum state and population is presented by numerical simulations based on self-consistent set of density matrix equations and Maxwell equations.