Department of Physics, Stanford University, Stanford, California 94305, USA.
Phys Rev Lett. 2013 Aug 23;111(8):083001. doi: 10.1103/PhysRevLett.111.083001. Epub 2013 Aug 19.
We show that light-pulse atom interferometry with atomic point sources and spatially resolved detection enables multiaxis (two rotation, one acceleration) precision inertial sensing at long interrogation times. Using this method, we demonstrate a light-pulse atom interferometer for 87Rb with 1.4 cm peak wave packet separation and a duration of 2T=2.3 s. The inferred acceleration sensitivity of each shot is 6.7×10(-12)g, which improves on previous limits by more than 2 orders of magnitude. We also measure Earth's rotation rate with a precision of 200 nrad/s.
我们证明了使用原子点源和空间分辨探测的光脉冲原子干涉技术可以在长询问时间内实现多轴（两个旋转，一个加速度）精密惯性传感。使用这种方法，我们演示了一个用于 87Rb 的光脉冲原子干涉仪，其峰值波包分离为 1.4cm，持续时间为 2T=2.3s。每个 shot 的推断加速度灵敏度为 6.7×10(-12)g，比以前的极限提高了两个数量级以上。我们还以 200nrad/s 的精度测量了地球的自转速率。
