Results 41 to 50 of about 1,418,125 (307)
Quantum metrology with critical driven-dissipative collective spin system [PDF]
Physica Scripta, 2023 We propose two critical dissipative quantum metrology schemes for single parameter estimation which are based on a quantum probe consisting of a coherently driven ensemble of N spin-1/2 particles under the effect of a collective spin decay.
Venelin Pavlov, D. Porras, P. Ivanov
semanticscholar +1 more source
Quantum enhanced non-interferometric quantitative phase imaging
Light: Science & Applications, 2023 Quantum entanglement and squeezing have significantly improved phase estimation and imaging in interferometric settings beyond the classical limits.
Giuseppe Ortolano +7 more
doaj +1 more source
EURAMET EMN-Q: The European metrology network for quantum technologies
Measurement: Sensors, 2021 The second quantum revolution is underway and the deployment of Quantum Technologies (QT) keeps pace with it. This technological paradigm-switch creates opportunities and challenges for industry, innovation and society.
Ivo Pietro Degiovanni +4 more
doaj +1 more source
Hierarchies of Frequentist Bounds for Quantum Metrology: From Cramér-Rao to Barankin. [PDF]
Physical Review Letters, 2023 We derive lower bounds on the variance of estimators in quantum metrology by choosing test observables that define constraints on the unbiasedness of the estimator.
M. Gessner, A. Smerzi
semanticscholar +1 more source
Quantum interferometric metrology with entangled photons
Frontiers in Physics, 2022 Quantum interferences of entangled photons have engendered tremendous intriguing phenomena that lack any counterpart in classical physics. Hitherto, owing to the salient properties of quantum optics, quantum interference has been widely studied and ...
Yuanyuan Chen, Ling Hong, Lixiang Chen
doaj +1 more source
Using Adaptiveness and Causal Superpositions Against Noise in Quantum Metrology. [PDF]
Physical Review Letters, 2022 We derive new bounds on achievable precision in the most general adaptive quantum metrological scenarios. The bounds are proven to be asymptotically saturable and equivalent to the known parallel scheme bounds in the limit of a large number of channel ...
Stanisław Kurdziałek +3 more
semanticscholar +1 more source
Optimal Strategies of Quantum Metrology with a Strict Hierarchy. [PDF]
Physical Review Letters, 2022 One of the main quests in quantum metrology is to attain the ultimate precision limit with given resources, where the resources are not only of the number of queries, but more importantly of the allowed strategies.
Qiu-yu Liu +3 more
semanticscholar +1 more source
Entanglement-Enhanced Quantum Metrology in Colored Noise by Quantum Zeno Effect. [PDF]
Physical Review Letters, 2022 In open quantum systems, the precision of metrology inevitably suffers from the noise. In Markovian open quantum dynamics, the precision can not be improved by using entangled probes although the measurement time is effectively shortened. However, it was
Xinyue Long +11 more
semanticscholar +1 more source
Quantum metrology with nonclassical states of atomic ensembles [PDF]
Reviews of Modern Physics, 2016 Quantum technologies exploit entanglement to revolutionize computing, measurements, and communications. This has stimulated the research in different areas of physics to engineer and manipulate fragile many-particle entangled states.
L. Pezzè +4 more
semanticscholar +1 more source