Results 21 to 30 of about 1,078,579 (226)
Quantum measurement encoding for quantum metrology
Physical Review ResearchPreserving the precision of the parameter of interest in the presence of environmental decoherence is an important yet challenging task in dissipative quantum sensing. In this work, we study quantum metrology when the decoherence effect is unraveled by a
Jing Yang
doaj +3 more sources
Programmable microwave cluster states via Josephson metamaterials [PDF]
Nature CommunicationsCluster states are a fundamental resource for continuous-variable quantum computing, enabling measurement-based protocols that can scale beyond the limitations of qubit-based architectures. Here, we demonstrate on-demand generation of multimode entangled
A. Alocco +7 more
doaj +2 more sources
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
doaj +1 more source
Quantum metrology with imperfect measurements. [PDF]
Nat Commun, 2022 AbstractThe impact of measurement imperfections on quantum metrology protocols has not been approached in a systematic manner so far. In this work, we tackle this issue by generalising firstly the notion of quantum Fisher information to account for noisy detection, and propose tractable methods allowing for its approximate evaluation. We then show that
Len YL +3 more
europepmc +8 more sources
Understanding and Improving Critical Metrology. Quenching Superradiant Light-Matter Systems Beyond the Critical Point [PDF]
Quantum, 2022 We carefully examine critical metrology and present an improved critical quantum metrology protocol which relies on quenching a system exhibiting a superradiant quantum phase transition beyond its critical point. We show that this approach can lead to an
Karol Gietka, Lewis Ruks, Thomas Busch
doaj +1 more source
Optimal adaptive control for quantum metrology with time-dependent Hamiltonians [PDF]
Nature Communications, 2017 Shengshi Pang, Andrew N. Jordan
exaly +2 more sources
Physical Review Letters, 2006 We point out a general framework that encompasses most cases in which quantum effects enable an increase in precision when estimating a parameter (quantum metrology). The typical quantum precision-enhancement is of the order of the square root of the number of times the system is sampled.
GIOVANNETTI, VITTORIO +2 more
openaire +4 more sources
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
Quantum Critical Metrology [PDF]
Physical Review Letters, 2018 4+3 pages; 3+2 ...
Frérot, Irénée, Roscilde, Tommaso
openaire +3 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 +1 more source