A recent experiment has demonstrated the quantum nature of spatial fluctuations in parametric down-conversion. We show theoretically and numerically that, by exploiting the sub-shot-noise character of spatial correlations, it is possible to detect weak amplitude objects with a sensitivity beyond the standard quantum limit.
Quantum imaging and the detection of weak objects
BRAMBILLA, ENRICO;Caspani L.;JEDRKIEWICZ, OTTAVIA;DI TRAPANI, PAOLO;
2007-01-01
Abstract
A recent experiment has demonstrated the quantum nature of spatial fluctuations in parametric down-conversion. We show theoretically and numerically that, by exploiting the sub-shot-noise character of spatial correlations, it is possible to detect weak amplitude objects with a sensitivity beyond the standard quantum limit.
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