论文标题
可用于原子喷泉干涉法的强大优化脉冲方案
Robust Optimized Pulse Schemes for Atomic Fountain Interferometry
论文作者
论文摘要
原子喷泉干涉仪与原子初始速度的变化以及偏离最佳脉冲振幅的偏差的鲁棒性。我们在数值上模拟了动量空间中干涉仪的动力学，最大分离为$ 20 \ hbar k $，并根据初始速度分布的方差和激光场振幅的值来绘制预期信号对比度。我们表明，与由一系列狂犬病脉冲组成的常用方案相比，基于快速绝热通道的激发方案显着增强了预期信号对比度。我们通过使用最佳控制理论来识别在脉冲振幅和速度的集合平均值上表现良好的分裂脉冲，从而进一步展示了鲁棒性的实质性增长。我们的结果表明，最佳控制能够显着增强原子喷泉干涉法的未来实施的能力。
The robustness of an atomic fountain interferometer with respect to variations in the initial velocity of the atoms and deviations from the optimal pulse amplitude is examined. We numerically simulate the dynamics of an interferometer in momentum space with a maximum separation of $20 \hbar k$ and map out the expected signal contrast depending on the variance of the initial velocity distribution and the value of the laser field amplitude. We show that an excitation scheme based on rapid adiabatic passage significantly enhances the expected signal contrast compared to the commonly used scheme consisting of a series of Rabi pulses. We demonstrate further substantial increase of the robustness by using optimal control theory to identify splitting and swapping pulses that perform well on an ensemble average of pulse amplitudes and velocities. Our results demonstrate the ability of optimal control to significantly enhance future implementations of atomic fountain interferometry.
