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Contextual quantum metrology [PDF]
npj Quantum Information, 2023 We demonstrate that the contextuality of measurement selection can enhance the precision of quantum metrology with a simple linear optical experiment. Contextuality is a nonclassical property known as a resource for various quantum information processing
Jeongwoo Jae +4 more
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Speed limit of quantum metrology. [PDF]
Sci Rep, 2023 Quantum metrology employs nonclassical systems to improve the sensitivity of measurements. The ultimate limit of this sensitivity is dictated by the quantum Cramér–Rao bound.
Maleki Y, Ahansaz B, Maleki A.
europepmc +5 more sources
Variational quantum metrology for multiparameter estimation under dephasing noise. [PDF]
Sci Rep, 2023 We present a hybrid quantum-classical variational scheme to enhance precision in quantum metrology. In the scheme, both the initial state and the measurement basis in the quantum part are parameterized and optimized via the classical part. It enables the
Le TK, Nguyen HQ, Ho LB.
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Adiabatic critical quantum metrology cannot reach the Heisenberg limit even when shortcuts to adiabaticity are applied [PDF]
Quantum, 2021 We show that the quantum Fisher information attained in an adiabatic approach to critical quantum metrology cannot lead to the Heisenberg limit of precision and therefore $regular$ quantum metrology under optimal settings is always superior. Furthermore,
Karol Gietka +3 more
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Critical Quantum Metrology in the Non-Linear Quantum Rabi Model. [PDF]
Entropy (Basel), 2022 The quantum Rabi model (QRM) with linear coupling between light mode and qubit exhibits the analog of a second-order phase transition for vanishing mode frequency which allows for criticality-enhanced quantum metrology in a few-body system.
Ying ZJ, Felicetti S, Liu G, Braak D.
europepmc +3 more sources
Experimental demonstration of topological bounds in quantum metrology. [PDF]
Natl Sci Rev, 2022 Quantum metrology is deeply connected to quantum geometry, through the fundamental notion of quantum Fisher information. Inspired by advances in topological matter, it was recently suggested that the Berry curvature and Chern numbers of band structures ...
Yu M +8 more
europepmc +3 more sources
Steering-enhanced quantum metrology using superpositions of noisy phase shifts [PDF]
Physical Review Research, 2023 Quantum steering is an important correlation in quantum information theory. A recent work [Nat. Commun. 12, 2410 (2021)NCAOBW2041-172310.1038/s41467-021-22353-3] showed that quantum steering is also useful for quantum metrology.
Kuan-Yi Lee +5 more
doaj +2 more sources
Optimal Scheme for Quantum Metrology [PDF]
Advanced Quantum Technologies, 2021 Quantum metrology can achieve far better precision than classical metrology, and is one of the most important applications of quantum technologies in the real world.
Jing Liu +4 more
semanticscholar +3 more sources
Quantum Metrology in the Finite-Sample Regime
PRX Quantum, 2023 In quantum metrology, a major application of quantum technologies, the ultimate precision of estimating an unknown parameter is often stated in terms of the Cramér-Rao bound.
Johannes Jakob Meyer +4 more
doaj +2 more sources
Experimental critical quantum metrology with the Heisenberg scaling
npj Quantum Information, 2021 Critical quantum metrology, which exploits quantum critical systems as probes to estimate a physical parameter, has gained increasing attention recently.
Ran Liu +8 more
doaj +2 more sources