Experimental set-up for high-sensitivity interferometry using coherent states as input and exploiting an amplification process to increase the robustness of the signal.

From the article:

Phase Estimation via Quantum Interferometry for Noisy Detectors
Nicolò Spagnolo, Chiara Vitelli, Vito Giovanni Lucivero, Vittorio Giovannetti, Lorenzo Maccone, and Fabio Sciarrino
Phys. Rev. Lett. 108, 233602 (2012)

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