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We present a protocol that combines quantum and classical resources to increase the sensitivity of a phase measurement. The superresolution is achieved through the use of N00N states and multiple passes through a prism pair.
We demonstrate experimentally a new procedure for obtaining spatial super-resolution in quantum imaging by measuring optical centroid. Our results show spatial resolution enhancement identical to that of quantum lithography but with higher detection efficiency.
We report resolution improvements exceeding the standard Rayleigh limit using an interferometric, nonlinear optical method. Using PMMA as an N-photon lithographic material, we record fringes with a period of a quarter of the wavelength.
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