Zobrazeno 1 - 10
of 1 217
pro vyhledávání: '"Quantum Fisher Information"'
Publikováno v:
Alexandria Engineering Journal, Vol 104, Iss , Pp 378-385 (2024)
In this paper, we explore the dynamics of the global quantum discord (GQD) and quantum Fisher information (QFI) of a multipartite two-level stationary and moving atomic system under the Stark shift effect. The system interacts with a thermal field wi
Externí odkaz:
https://doaj.org/article/d1325e8e68c14fec9a32dc85d57ee40b
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-17 (2024)
Abstract We address quantum metrology in critical spin chains with anisotropy and Dzyaloshinskii–Moriya (DM) interaction, and show how local and quasi-local measurements may be exploited to characterize global properties of the systems. In particul
Externí odkaz:
https://doaj.org/article/fe8fa56600e34d6c87393c006a065927
Publikováno v:
Alexandria Engineering Journal, Vol 89, Iss , Pp 202-209 (2024)
In this study, we investigate the impact of the XYZ-DM-Heisenberg model on quantum resources, including local quantum Fisher information, concurrence, and Jensen-Shannon coherence, in the presence of intrinsic decoherence. By exploring various spin-e
Externí odkaz:
https://doaj.org/article/6277d825cadd4e108663fa086ea76113
Autor:
Dong Xie, Chunling Xu
Publikováno v:
Results in Physics, Vol 61, Iss , Pp 107735- (2024)
Tripartite interactions play a fundamental role in the quantum information processing and quantum technology. However, it is generally difficult to realize strong tripartite coupling. We investigate the estimation of a tripartite coupling strength in
Externí odkaz:
https://doaj.org/article/93b0eaca45114098a625e35a5f6cf25b
Publikováno v:
Quantum Frontiers, Vol 2, Iss 1, Pp 1-8 (2023)
Abstract Improving three-dimensional (3D) localization precision is of paramount importance for super-resolution imaging. By properly engineering the point spread function (PSF), such as utilizing Laguerre–Gaussian (LG) modes and their superpositio
Externí odkaz:
https://doaj.org/article/bb51a2250d3a4a5ab2adfb17a5fddd72
Publikováno v:
Alexandria Engineering Journal, Vol 77, Iss , Pp 239-246 (2023)
This paper explores the dynamics of two spatially separated superconducting flux qubits, initially in a maximally correlated state, without mutual interaction. The system is modeled using the master intrinsic decoherence equation with the flux-qubits
Externí odkaz:
https://doaj.org/article/64376bb1994b4589a2b15913ab303e4d
Autor:
Bertlmann, Reinhold A., author, Friis, Nicolai, author
Publikováno v:
Modern Quantum Theory : From Quantum Mechanics to Entanglement and Quantum Information, 2023, ill.
Externí odkaz:
https://doi.org/10.1093/oso/9780199683338.003.0024
Publikováno v:
Entropy, Vol 26, Iss 7, p 568 (2024)
The metrological limits of thermometry operated in nonequilibrium dynamical regimes are analyzed. We consider a finite-dimensional quantum system, employed as a quantum thermometer, in contact with a thermal bath inducing Markovian thermalization dyn
Externí odkaz:
https://doaj.org/article/2a66adef14d6462ab1b96e7f952ad6bc
Publikováno v:
Results in Physics, Vol 54, Iss , Pp 107095- (2023)
In this paper, we investigate steered quantum coherence, i.e., the l1 norm of steered coherence and the relative entropy of steered coherence, and the quantum Fisher information in the Gibbs state of two-qubit XXZ systems. Their variations with respe
Externí odkaz:
https://doaj.org/article/54caeeb127db4a049f9f70735c4c7f67
Publikováno v:
Results in Physics, Vol 53, Iss , Pp 107010- (2023)
The generalized amplitude damping (GAD) noise models the dynamical map of a qubit in contact with a non-zero temperature bosonic reservoir. When two qubits successively pass through the same GAD channel, correlation effects should be taken into accou
Externí odkaz:
https://doaj.org/article/a26e43a82fe5466ea52987ffde4243e3