The extraordinary sensitivity of plasmonic sensors is well-known in the optics and photonics
community. These sensors exploit simultaneously the enhancement and the localization of …

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 …

An SU (1, 1) interferometer, which replaces the beam splitters in a Mach–Zehnder
interferometer with nonlinear interactions, offers the potential of achieving improved phase …

In an unseeded SU (1, 1) interferometer composed of two cascaded degenerate parametric
amplifiers, with direct detection at the output, we demonstrate a phase sensitivity overcoming …

We propose the use of a quantum thermal machine for low-temperature thermometry. A hot
thermal reservoir coupled to the machine allows for simultaneously cooling the sample while …

The main power of quantum sensors is achieved when the probe is composed of several
particles. In this situation, quantum features such as entanglement contribute in enhancing …

We theoretically study the phase sensitivity of an SU (1, 1) interferometer, in which the phase
shift is induced by a Kerr medium, together with a coherent state input and homodyne …

Phase transitions represent a compelling tool for classical and quantum sensing
applications. It has been demonstrated that quantum sensors can in principle saturate the …

We study an entangled distributed quantum sensing scheme based on an array of d Mach-
Zehnder interferometers (MZIs) for the estimation of relative phase shifts. The scheme uses d …

High precision interferometers are the building blocks of precision metrology and the
ultimate interferometric sensitivity is limited by the quantum noise. Here, we propose and …