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 …

The purpose of quantum technologies is to explore how quantum effects can improve on
existing solutions for the treatment of information. Quantum photonics sensing holds great …

The interest in a system often resides in the interplay among different parameters governing
its evolution. It is thus often required to access many of them at once for a complete …

In the study of quantum limits to parameter estimation, the high dimensionality of the density
operator and that of the unknown parameters have long been two of the most difficult …

The quantum Fisher information matrix is a central object in multiparameter quantum
estimation theory. It is usually challenging to obtain analytical expressions for it because …

We analyze the ultimate quantum limit of resolving two identical sources in a noisy
environment. We prove that in the presence of noise causing false excitation, such as …

We consider the problem of estimating the spatial separation between two mutually
incoherent point light sources using the super-resolution imaging technique based on …

Localisation microscopy of multiple weak, incoherent point sources with possibly different
intensities in one spatial dimension is equivalent to estimating the amplitudes of a classical …

It has been recently shown that an interferometric measurement may allow for
subwavelength resolution of incoherent light. Whereas this holds for noiseless detectors …