Predictions of laser-cooling temperatures for multilevel atoms in three-dimensional polarization-gradient fields
Predictions of laser-cooling temperatures for multilevel atoms in three-dimensional polarization-gradient fields
复制标题
三维偏振梯度场中多级原子激光冷却温度的预测
DOI：
--
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
C. Greene
中科院分区：
文献类型：
--
作者：
J. Dunn;C. Greene
我们分析了原子激光相互作用的原子具有多个，紧密间隔，激发态超精细流形的动力学。该系统是完全量子力学处理，包括原子的质心自由度，和运动中描述的偏振梯度场创建的三维激光配置。我们开发了描述这个系统的主方程，然后通过消除激发态将其专门化到低强度极限。我们将展示如何使用蒙特卡罗波函数技术模拟这个主方程，我们提供了这个过程的实施细节。本文用蒙特卡罗方法计算了两种费米子碱土金属同位素{sup 25}Mg和{sup 87}Sr与三维直线-垂直直线激光器相互作用的稳态原子动量分布，给出了实验上可达到的激光冷却温度的估计值。
We analyze the dynamics of atom-laser interactions for atoms having multiple, closely spaced, excited-state hyperfine manifolds. The system is treated fully quantum mechanically, including the atom's center-of-mass degree of freedom, and motion is described in a polarization gradient field created by a three-dimensional laser configuration. We develop the master equation describing this system, and then specialize it to the low-intensity limit by adiabatically eliminating the excited states. We show how this master equation can be simulated using the Monte Carlo wave function technique, and we provide details on the implementation of this procedure. Monte Carlo calculations of steady state atomic momentum distributions for two fermionic alkaline earth isotopes, {sup 25}Mg and {sup 87}Sr, interacting with a three-dimensional lin-perpendicular-lin laser configuration are presented, providing estimates of experimentally achievable laser-cooling temperatures.