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

Superresolution techniques based on intensity measurements after a spatial mode
decomposition can overcome the precision of diffraction-limited direct imaging. However …

We present the key elements required for continuous variable parallel quantum information
protocols based on spatial multimode quantum correlations. We describe techniques for …

Recent works identified resolution limits for the distance between incoherent point sources.
However, it remains unclear how to choose suitable observables and estimators to reach …

Sensitivity limits are usually determined using the Cramér-Rao bound. Recently, this
approach has been used to obtain the ultimate resolution limit for the estimation of the …

Exchanging light pulses to perform accurate space-time positioning is a paradigmatic issue
of physics. It is ultimately limited by the quantum nature of light, which introduces fluctuations …

We recently proposed a novel concept to remotely acquire information of objects, based on
the discrete orbital angular momentum of ligh. Here we use two different experimental …

We present a detailed description of small displacement and tilt measurements of a
Gaussian beam using split detectors and TEM 10 homodyne detectors. Theoretical analysis …

We determine the limit to the maximum achievable sensitivity in the estimation of a scalar
parameter from the information contained in an optical image in the presence of quantum …

We propose a direct and real-time displacement measurement using an optical frequency
comb, able to compensate optically for index of refraction variations due to atmospheric …