Quantum technologies exploit entanglement to revolutionize computing, measurements, and
communications. This has stimulated the research in different areas of physics to engineer …

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

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 …

Photonics is a promising platform for implementing universal quantum information
processing. Its main challenges include precise control of massive circuits of linear optical …

We propose a decoy-pulse method to overcome the photon-number-splitting attack for
Bennett-Brassard 1984 quantum key distribution protocol in the presence of high loss: A …

Classical optical lithography is diffraction limited to writing features of a size λ/2 or greater,
where λ is the optical wavelength. Using nonclassical photon-number states, entangled N at …

Multiphoton interference reveals strictly nonclassical phenomena. Its applications range
from fundamental tests of quantum mechanics to photonic quantum information processing …

We are currently in the midst of a second quantum revolution The first quantum revolution
gave us new rules that govern physical reality. The second quantum revolution will take …

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

The estimation of parameters characterizing dynamical processes is central to science and
technology. The estimation error changes with the number N of resources employed in the …