Modern imaging technologies are widely based on classical principles of light or
electromagnetic wave propagation. They can be remarkably sophisticated, with recent …

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

According to quantum theory the energy exchange between physical systems is quantized.
As a direct consequence, measurement sensitivities are fundamentally limited by …

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 …

Nonclassical states of light find applications in enhancing the performance of optical
interferometric experiments, with notable example of gravitational-wave detectors. Still, the …

Quantum mechanics, through the Heisenberg uncertainty principle, imposes limits on the
precision of measurement. Conventional measurement techniques typically fail to reach …

This review aims at gathering the most relevant quantum multi-parameter estimation
methods that go beyond the direct use of the quantum Fisher information concept. We …

Nearly a century after Einstein first predicted the existence of gravitational waves, a global
network of Earth-based gravitational wave observatories,,, is seeking to directly detect this …

Conventional interferometers usually utilize beam splitters for wave splitting and
recombination. These interferometers are widely used for precision measurement. Their …