A comparative study of LQU and LQFI in general qubit-qutrit axially symmetric states.

M A Yurischev, Saeed Haddadi, Mehrdad Ghominejad

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Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1 citing paper in PubMed.

Quantumness of hybrid systems under quantum noise.Scientific reports · 2026
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3 authors.

M A YurischevFederal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka, Moscow Region, Russia, 142432.ORCID http://orcid.org/0000-0003-1719-3884

Saeed HaddadiFaculty of Physics, Semnan University, P.O.Box 35195-363, Semnan, Iran. haddadi@semnan.ac.ir.ORCID http://orcid.org/0000-0002-1596-0763

Mehrdad GhominejadFaculty of Physics, Semnan University, P.O.Box 35195-363, Semnan, Iran.ORCID http://orcid.org/0000-0002-0136-7838

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6 · The paper itself

Abstract

We derive the compact closed forms of local quantum uncertainty (LQU) and local quantum Fisher information (LQFI) for hybrid qubit-qutrit axially symmetric (AS) states. This allows us to study the quantum correlations in detail and present some essentially novel results for spin-(1/2, 1) systems, the Hamiltonian of which contains ten independent types of physically important parameters. As an application of the derived formulas, we study the behavior of these two quantum correlation measures at thermal equilibrium. New features are observed in their behavior that are important for quantum information processing. Specifically, cascades of sudden changes in the behavior of LQU and LQFI are found with a smooth change in temperature or interaction parameters. Interestingly, in some cases, sudden transitions are observed in the behavior of LQU but not in LQFI, and vice versa. Moreover, our compact formulas open a way to apply them to other problems, for instance, when investigating the environmental effects on quantum correlations in open systems.

Indexed as

Axial U(1) symmetry groupLocal quantum Fisher informationLocal quantum uncertaintyQubit-qutrit system

Identifiers

PMID39805907

DOI10.1038/s41598-024-84857-4

PMCPMC11729907

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