论文标题
由皮秒频率梳驱动的原子干涉仪
An atom interferometer driven by a picosecond frequency comb
论文作者
论文摘要
我们基于picsecond频率 - 炸弹激光器的自由坠落原子的衍射演示了一个浅脉冲原子干涉仪。更具体地说，我们通过驾驶$ | 5S〜^2s_ {1/2}之间的刺激的拉曼过渡，F = 1 \ rangle $和$ | 5S〜S〜^2s_ {1/2}，F = 2 \ rangle $ puls a Pic pic pic pic pic pic pic pic pic pic pic pic pic pic pic pic pic pic pic pic pic pic pic pic pic pic c pic pic c pic 5s〜^2s_ {1/2}，使用两种培训，使用两种培训，使用两种培训反传播几何形状。我们研究脉冲长度以及审问时间对原子干涉仪对比度的影响。我们的实验数据通过基于有效耦合的数值模拟很好地复制，该耦合取决于脉冲和原子云之间的重叠。这些结果为将轻脉冲干涉量扩展到其他光谱区域的过渡铺平了道路，因此是为了向计量学的新可能性，感知引力惯性效应的新可能性以及基本物理学的测试。
We demonstrate a light-pulse atom interferometer based on the diffraction of free-falling atoms by a picosecond frequency-comb laser. More specifically, we coherently split and recombine wave packets of cold $^{87}$Rb atoms by driving stimulated Raman transitions between the $|5s~^2S_{1/2},F=1\rangle$ and $|5s~^2S_{1/2},F=2\rangle$ hyperfine states, using two trains of picosecond pulses in a counter-propagating geometry. We study the impact of the pulses length as well as of the interrogation time onto the contrast of the atom interferometer. Our experimental data are well reproduced by a numerical simulation based on an effective coupling which depends on the overlap between the pulses and the atomic cloud. These results pave the way for extending light-pulse interferometry to transitions in other spectral regions and therefore to other species, for new possibilities in metrology, sensing of gravito-inertial effects and tests of fundamental physics.
