Department of Physics, Stanford University, Stanford, California 94305, USA.
Phys Rev Lett. 2013 Sep 13;111(11):113002. doi: 10.1103/PhysRevLett.111.113002. Epub 2013 Sep 10.
We present a method for determining the phase and contrast of a single shot of an atom interferometer. The application of a phase shear across the atom ensemble yields a spatially varying fringe pattern at each output port, which can be imaged directly. This method is broadly relevant to atom-interferometric precision measurement, as we demonstrate in a 10 m 87Rb atomic fountain by implementing an atom-interferometric gyrocompass with 10 mdeg precision.
我们提出了一种确定单-shot 原子干涉仪相位和对比度的方法。在原子束上施加相位剪切会在每个输出端口产生空间变化的条纹图案，可以直接成像。我们在 10 m 的 87Rb 原子喷泉中实现了具有 10 mdeg 精度的原子干涉陀螺，证明了这种方法在原子干涉精密测量中具有广泛的应用。
