Entanglement-enhanced atomic gyroscope
Entanglement-enhanced atomic gyroscope
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DOI：
10.1103/physreva.81.043624
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发表时间：
2010-03
影响因子：
2.9
通讯作者：
J. Cooper;D. Hallwood;J. Dunningham
中科院分区：
文献类型：
--
作者：
J. Cooper;D. Hallwood;J. Dunningham
越来越精确的陀螺仪的出现在导航系统的技术发展中发挥了关键作用。例如，环形激光器和光纤陀螺仪广泛用于现代惯性制导系统，并依赖于非纠缠光子的干涉来测量机械旋转。这些装置的灵敏度与用作1/{radical}（N）的粒子数成比例。在这里，我们展示了如何通过使用纠缠粒子的源，有可能做得更好，甚至达到量子力学所允许的精度为1/N的极限。我们提出了一个陀螺仪方案，使用超冷原子被困在光环势。
The advent of increasingly precise gyroscopes has played a key role in the technological development of navigation systems. Ring-laser and fiber-optic gyroscopes, for example, are widely used in modern inertial guidance systems and rely on the interference of unentangled photons to measure mechanical rotation. The sensitivity of these devices scales with the number of particles used as 1/{radical}(N). Here we demonstrate how, by using sources of entangled particles, it is possible to do better and even achieve the ultimate limit allowed by quantum mechanics where the precision scales as 1/N. We propose a gyroscope scheme that uses ultracold atoms trapped in an optical ring potential.