The wave-particle duality of light introduces two fundamental problems to imaging, namely,
the diffraction limit and the photon shot noise. Quantum information theory can tackle them …

Quantum metrology is one of the most promising applications of quantum technologies. The
aim of this research field is the estimation of unknown parameters exploiting quantum …

Rayleigh's criterion for resolving two incoherent point sources has been the most influential
measure of optical imaging resolution for over a century. In the context of statistical image …

The Rayleigh criterion specifies the minimum separation between two incoherent point
sources that may be resolved into distinct objects. We revisit this problem by examining the …

We identify precision limits for the simultaneous estimation of multiple parameters in
multimode interferometers. Quantum strategies to enhance the multiparameter sensitivity are …

We establish the multiparameter quantum Cramér-Rao bound for simultaneously estimating
the centroid, the separation, and the relative intensities of two incoherent optical point …

Estimating the angular separation between two incoherent thermal sources is a challenging
task for direct imaging, especially at lengths within the diffraction limit. Moreover, detecting …

The quantum Cramér-Rao bound for the joint estimation of the centroid and the separation
between two incoherent point sources cannot be saturated. As such, the optimal …

We present the experimental implementation of simultaneous spatial multimode
demultiplexing as a distance measurement tool. We use this technique to estimate the …

Rayleigh's criterion states that it becomes essentially difficult to resolve two incoherent
optical point sources separated by a distance below the width of point spread functions …