Quantum Fisher information matrix (QFIM) is a core concept in theoretical quantum
metrology due to the significant importance of quantum Cramér–Rao bound in quantum …

Quantum metrology holds the promise of an early practical application of quantum
technologies, in which measurements of physical quantities can be made with much greater …

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 …

The recent advent of noisy intermediate-scale quantum devices, especially near-term
quantum computers, has sparked extensive research efforts concerned with their possible …

Quantum channel estimation and discrimination are fundamentally related information
processing tasks of interest in quantum information science. In this paper, we analyze these …

Measurement noise is a major source of noise in quantum metrology. Here, we explore
preprocessing protocols that apply quantum controls to the quantum sensor state prior to the …

Overparametrization is one of the most surprising and notorious phenomena in machine
learning. Recently, there have been several efforts to study if, and how, quantum neural …

Conventional classical sensors are approaching their maximum sensitivity levels in many
areas. Yet these levels are still far from the ultimate limits dictated by quantum mechanics …

Two-photon absorption (TPA) is of fundamental importance in super-resolution imaging and
spectroscopy. Its nonlinear character allows for the prospect of using quantum resources …

This work compares the performance of single-and two-qubit probes for estimating several
phase rotations simultaneously under the action of different noisy channels. We compute the …