Results 41 to 50 of about 27,088 (288)
Probing cosmic string spacetime through parameter estimation
European Physical Journal C: Particles and Fields, 2022 Quantum metrology studies the ultimate precision limit of physical quantities by using quantum strategy. In this paper we apply the quantum metrology technologies to the relativistic framework for estimating the deficit angle parameter of cosmic string ...
Ying Yang, Jiliang Jing, Zehua Tian
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Fidelity and Fisher information on quantum channels
New Journal of Physics, 2017 The fidelity function for quantum states has been widely used in quantum information science and frequently arises in the quantification of optimal performances for the estimation and distinguishing of quantum states.
Haidong Yuan, Chi-Hang Fred Fung
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Metrology and multipartite entanglement in measurement-induced phase transition [PDF]
QuantumMeasurement-induced phase transition arises from the competition between a deterministic quantum evolution and a repeated measurement process. We explore the measurement-induced phase transition through the Quantum Fisher Information in two different ...
Giovanni Di Fresco +3 more
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Covariance and Fisher information in quantum mechanics [PDF]
Journal of Physics A: Mathematical and General, 2002 Variance and Fisher information are ingredients of the Cramer-Rao inequality. We regard Fisher information as a Riemannian metric on a quantum statistical manifold and choose monotonicity under coarse graining as the fundamental property of variance and Fisher information.
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Fisher information as a probe of spacetime structure: relativistic quantum metrology in (A)dS
Journal of High Energy Physics, 2021 Relativistic quantum metrology studies the maximal achievable precision for estimating a physical quantity when both quantum and relativistic effects are taken into account.
Haoxing Du, Robert B. Mann
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, 2021 In this paper, we study a Hamiltonian system constituted by two coupled two-level atoms (qubits) interacting with a nonlinear generalized cavity field. The nonclassical two-qubit correlation dynamics are investigated using Bures distance entanglement and
A.-B. A. Mohamed +3 more
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Comment on ‘On the realisation of quantum Fisher information’ [PDF]
European Journal of Physics, 2017 It is shown that calculation of the momentum Fisher information of the quasione- dimensional hydrogen atom recently presented by Saha et al (2017 Eur. J. Phys. {\bf 38} 025103) is wrong. A correct derivation is provided and its didactical advantages and scientific significances are highlighted.
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Operational Interpretation of Quantum Fisher Information in Quantum Thermodynamics
Physical Review Letters, 2022 5 pages+24 pages of Supplementary Material. Some results were previously included in version 1 of arXiv:1805.01989 [quant-ph]
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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
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Quantum nonunital dynamics of spin-bath-assisted Fisher information
AIP Advances, 2016 The nonunital non-Markovian dynamics of qubits immersed in a spin bath is studied without any Markovian approximation. The environmental effects on the precisions of quantum parameter estimation are taken into account.
Xiang Hao, Yinzhong Wu
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