论文标题
在空腔原子干涉仪中，由相位调节的光驱动的拉曼过渡
Raman transitions driven by phase-modulated light in a cavity atom interferometer
论文作者
论文摘要
光腔中的原子干涉仪受益于强的激光强度和高质量的波前。驱动拉曼过渡所需的激光频率对（通常是通过调节单色光束产生的）在腔体中形成多个站立波，从而导致沿腔轴的原子光相互作用的特性的周期性空间变化。在这里，我们对这种空间依赖性进行建模，并计算两光子狂犬病频率和交流型变化。我们将模型与用不同的空腔和脉冲参数（例如从载体频率偏移）和原子云的纵向位置进行比较。我们展示了将腔参数设置为最佳值如何提高腔内所有位置的拉曼过渡效率，而与未优化的情况相比，Mach-Zehnder腔原子干涉仪中的对比度几乎是对比度的两倍。
Atom interferometers in optical cavities benefit from strong laser intensities and high-quality wavefronts. The laser frequency pairs that are needed for driving Raman transitions (often generated by phase modulating a monochromatic beam) form multiple standing waves in the cavity, resulting in a periodic spatial variation of the properties of the atom-light interaction along the cavity axis. Here, we model this spatial dependence and calculate two-photon Rabi frequencies and ac Stark shifts. We compare the model to measurements performed with varying cavity and pulse parameters such as cavity offset from the carrier frequency and the longitudinal position of the atom cloud. We show how setting cavity parameters to optimal values can increase the Raman transition efficiency at all positions in the cavity and nearly double the contrast in a Mach-Zehnder cavity atom interferometer in comparison to the unoptimized case.
