Entanglement assisted spin-wave atom interferometer

Details Entanglement assisted spin-wave atom interferometer Entanglement assisted spin-wave atom interferometer

2009-04-23

arxiv.org/abs/0904.3617v2

Phys. Rev. Lett 104, 043601 (2010)

Physics

Quantum Physics

6 pages, 5 figures (including appendix)

Scientific paper

10.1103/PhysRevLett.104.043601

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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