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arXiv · 1211.5045

Deterministic Super Resolution with Coherent States at the Shot Noise Limit

Emanuele Distante·Miroslav Jezek·Ulrik L. Andersen
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Abstract

Interference of light fields plays an important role in various high-precision measurement schemes. It has been shown that super resolving phase measurements beyond the standard coherent state limit can be obtained either by using maximally entangled multi-particle states of light or using complex detection approaches. Here we show that super resolving phase measurements at the shot noise limit can be achieved without resorting to non-classical optical states or to low-efficiency detection processes. Using robust coherent states of light, high-efficiency homodyne detection and a deterministic binarization processing technique, we show a narrowing of the interference fringes that scales with 1/Sqrt{N} where N is the mean number of photons of the coherent state. Experimentally we demonstrate a 12-fold narrowing at the shot noise limit.

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Emanuele Distante, Miroslav Jezek, Ulrik L. Andersen. 2012-11-21. Deterministic Super Resolution with Coherent States at the Shot Noise Limit. https://doi.org/10.1103/physrevlett.111.033603

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