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One of the challenges of quantum technologies is realising the quantumadvantage, predicted for ideal systems, in real applications, which have tocope with decoherence and inefficiencies. In quantum metrology, sub-shot-noiseimaging (SSNI) and sensing methods can provide genuine quantum enhancement inrealistic situations. However, wide field SSNI schemes realized so far suffer atrade-off between the resolution and the sensitivity gain over classicalcounterpart: small pixels or integrating area, are necessary to achieve highimaging resolution, but larger pixels allow a better detection efficiency ofquantum correlations, which means a larger quantum advantage. Here we show howthe SSNI protocol can be optimized to significantly improve the resolutionwithout giving up the quantum advantage in the sensitivity. We show a linearresolution improvement (up to a factor 3) with respect to the simple protocolused in previous demonstrations.

Improving resolution-sensitivity trade off in sub-shot noise imaging