The power of quantum computing technologies is based on the fundamentals of quantum
mechanics, such as quantum superposition, quantum entanglement, or the no-cloning …

Quantum information technologies, on the one hand, and intelligent learning systems, on the
other, are both emergent technologies that are likely to have a transformative impact on our …

Many-particle entanglement is a key resource for achieving the fundamental precision limits
of a quantum sensor. Optical atomic clocks, the current state of the art in frequency precision …

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

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 …

Simultaneous estimation of multiple parameters in quantum metrological models is
complicated by factors relating to the (i) existence of a single probe state allowing for optimal …

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 …

We consider a general model of unitary parameter estimation in the presence of Markovian
noise, where the parameter to be estimated is associated with the Hamiltonian part of the …

Quantum metrology protocols allow us to surpass precision limits typical to classical
statistics. However, in recent years, no-go theorems have been formulated, which state that …

The time-energy uncertainty relation (TEUR) Δ t Δ E≥ 1 2 holds if the Hamiltonian is
completely unknown, but can be violated otherwise; here we initiate a rigorous study …