Entanglement assisted spin-wave atom interferometer
Yu-Ao Chen, Xiao-Hui Bao, Zhen-Sheng Yuan, Shuai Chen, Bo Zhao,, Jian-Wei Pan
TL;DR
This paper demonstrates phase super-resolution in a spin-wave atom interferometer using entangled NOON states, advancing quantum measurement techniques with potential for scaling to highly entangled states.
Contribution
It presents the first observation of phase super-resolution in a spin-wave atom interferometer utilizing heralded NOON-type entangled states.
Findings
Observed phase super-resolution with NOON states
Demonstrated interference pattern sensitive to atomic motion
Showed potential for scaling to highly entangled states
Abstract
We report the observation of phase-super resolution in a motion-sensitive spin-wave (SW) atom interferometer utilizing a NOON-type entanged state. The SW interferometer is implemented by generating a superposition of two SWs and observing the interference between them, where the interference fringe is sensitive to the atomic collective motion. By heralded generation of a second order NOON state in the SW interferometer, we clearly observe the interference pattern with phase super-resolution. The demonstrated SW interferometer can in principle be scaled up to highly entangled quantum state, and thus is of fundamental importance to implement quantum-enhanced-measurement.
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