Results 1 to 10 of about 1,078,579 (226)
Variational-state quantum metrology
New Journal of Physics, 2020 Quantum technologies exploit entanglement to enhance various tasks beyond their classical limits including computation, communication and measurements.
Bálint Koczor +4 more
doaj +4 more sources
Steering-enhanced quantum metrology using superpositions of noisy phase shifts
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 +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
npj Quantum Information, 2022 The quantum Cramér–Rao bound sets a fundamental limit on the accuracy of unbiased parameter estimation in quantum systems, relating the uncertainty in determining a parameter to the inverse of the quantum Fisher information. We experimentally demonstrate
Min Yu +10 more
doaj +1 more source
Super-Heisenberg scaling in Hamiltonian parameter estimation in the long-range Kitaev chain
Physical Review Research, 2022 In quantum metrology, nonlinear many-body interactions can enhance the precision of Hamiltonian parameter estimation to surpass the Heisenberg scaling.
Jing Yang +3 more
doaj +1 more source
Temporal analog of Fabry-Pérot resonator via coherent population trapping
npj Quantum Information, 2021 Ramsey spectroscopy via coherent population trapping (CPT) is essential in precision measurements. The conventional CPT-Ramsey fringes contain numbers of almost identical oscillations and so that it is difficult to identify the central fringe.
Ruihuan Fang +8 more
doaj +1 more source
PRX Quantum, 2022 The purpose of quantum technologies is to explore how quantum effects can improve on existing solutions for the treatment of information. Quantum photonics sensing holds great promise for reaching a more efficient trade-off between invasivity and quality
Marco Barbieri
doaj +1 more source
Incompatibility in Multi-Parameter Quantum Metrology with Fermionic Gaussian States
Proceedings, 2019 In this article we derive a closed form expression for the incompatibility condition in multi-parameter quantum metrology when the reference states are Fermionic Gaussian states.
Angelo Carollo +2 more
doaj +1 more source
Quantum metrology in local dissipative environments
New Journal of Physics, 2017 Quantum metrology allows us to attain a measurement precision that surpasses the classically achievable limit by using quantum characters. The metrology precision is raised from the standard quantum limit (SQL) to the Heisenberg limit (HL) by using ...
Yuan-Sheng Wang, Chong Chen, Jun-Hong An
doaj +1 more source
Applied Sciences, 2021 In this work, biomolecules, such as membrane proteins, lipids, and DNA, were identified and their spatial distribution was mapped within a single Escherichia coli cell by Raman hyperspectral imaging.
Giulia Barzan +5 more
doaj +1 more source