Nonclassical correlations in two-qubit Ising model with an arbitrary magnetic field: Local quantum Fisher information and local quantum uncertainty

Abdelghany, R. A.; Mohamed, A.-B.A.; Tammam, Mahmoud; Obada, A.‐S. F.

doi:10.1140/epjp/s13360-021-01649-9

Cited by 8 publications

(1 citation statement)

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“…Skew correlations and local quantum Fisher information have been employed to improve the estimate precision of an unknown phase shift in multipartite Glauber coherent states [29]. Nonclassical correlations, of LQFI and LQU, have been investigated in a two-qubit Ising model with an arbitrary magnetic field [30]. The local quantum uncertainty and local quantum Fisher information in a two-spin Heisenberg XYZ model with Dzyaloshinskii-Moriya (DM) and Kaplan-Shekhtman-Entin-Wohlman-Aharony (KESA) interactions [31] were studied with noise.…”

Section: Introductionmentioning

confidence: 99%

Thermal local Fisher information and quantum uncertainty in Heisenberg model

Mohamed¹,

Eleuch²

2022

Phys. Scr.

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This study explores the spontaneous emergence of local Fisher information and local quantum uncertainty beyond entanglement in a noisy two-qubit Heisenberg XXX model with Dzyaloshinskii-Moria (DM) and Kaplan-Shekhtman-Entin-Wohlman-Aharony (KSEA) interactions. Local quantum Fisher information, local quantum uncertainty, and logarithmic negativity are used to examine two-spin non-locality. We find that by employing strong two-spin, Dzyaloshinskii- Moriya, and Kaplan-Shekhtman-Entin-Wohlman-Aharony interactions, we can prevent noise-induced losses in local Fisher information, local quantum uncertainty, and logarithmic negativity. The robustness of the two-spin non-localities is greater for a strong spin's coupling strength than for the strong DM and KSEA interactions. Local Fisher information and local quantum uncertainty, as well as logarithmic-negativity, display asymmetric behaviors with respect to two-spin coupling and symmetric behaviors with respect to the Dzyaloshinskii-Moriya and Kaplan-Shekhtman-Entin-Wohlman-Aharony interactions. At high bath temperatures, the phenomenon of sudden-death two-spin entanglement emerges. Furthermore, by combining the parameters of the strong two-spin, DM, and KSEA interactions, the robustness of the produced two-spin non-localities can be improved.

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Section: Introductionmentioning

confidence: 99%