Robust strategies for lossy quantum interferometry

Details Robust strategies for lossy quantum interferometry Robust strategies for lossy quantum interferometry

2008-09-29

arxiv.org/abs/0809.5039v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevA.79.023812

We give a simple multiround strategy that permits to beat the shot noise limit when performing interferometric measurements even in the presence of loss. In terms of the average photon number employed, our procedure can achieve twice the sensitivity of conventional interferometric ones in the noiseless case. In addition, it is more precise than the (recently proposed) optimal two-mode strategy even in the presence of loss.

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