Distributed quantum metrology with a single squeezed-vacuum source
Dario Gatto, Paolo Facchi, Frank A. Narducci, Vincenzo Tamma · Physical Review Research · 2019
The authors present a technique to overcome the technological limitations of interferometry in quantum metrology by using squeezed light as the quantum resource, on-off detectors, and thus avoiding the need of any auxiliary interferometric channels. Their set-up achieves Heisenberg-limited sensitivity in the estimation of a linear combination of multiple phases