论文标题
在200个往返波导原子干涉仪中的一个第二次询问时间
One second interrogation time in a 200 round-trip waveguide atom interferometer
论文作者
论文摘要
我们报告了一个多环的原子干涉仪，其中原子会产生200个小振幅往返，而不是一个大型单轨道。通过使用Ultracold 39K气体和磁性Feshbach共振来启用该方法，该磁性可以调节零跨零的S波散射长度，从而显着减少冷碰撞中的原子损失。该方案在嘈杂的环境中具有弹性，达到了0.9 s的询问时间，而没有任何振动噪声隔离或取消。量子锁定放大的一种形式可以与设备一起使用，以测量具有高灵敏度的局部电势。我们使用此技术来测量1064 nm处39K基态的动态极化性。干涉仪也可能是一种有用的方法，用于构建用于旋转感测的紧凑的多环原子干涉仪。
We report a multiple-loop guided atom interferometer in which the atoms make 200 small-amplitude roundtrips, instead of one large single orbit. The approach is enabled by using ultracold 39K gas and a magnetic Feshbach resonance that can tune the s-wave scattering length across zero to significantly reduce the atom loss from cold collisions. This scheme is resilient against noisy environments, achieving 0.9 s interrogation time without any vibration noise isolation or cancellation. A form of quantum lock-in amplification can be used with the device to measure localized potentials with high sensitivity. We used this technique to measure the dynamic polarizability of the 39K ground state at 1064 nm. The interferometer may also be a useful approach to building a compact multiple-loop Sagnac atom interferometer for rotation sensing.
