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Quantum entanglement versus skew information correlations in dipole–dipole system under KSEA and DM interactions

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Abstract

In this manuscript, we explore the characteristics of thermal entanglement and skew information correlations in a dipolar coupled-spins system subjected to the combined effect of Kaplan–Shekhtman–Entin–Wohlman–Aharony (KSEA) and Dzyaloshinsky–Moriya (DM) interactions in the presence of an external homogenous magnetic field. We employ logarithmic negativity (LN) to characterize the degree of entanglement. Under the thermal reservoir effect, uncertainty-induced non-locality (UIN) and local quantum uncertainty (LQU) are both utilized to evaluate skew information correlations in the investigated system. The variations of the logarithmic negativity and skew information quantifiers are studied in terms of the equilibrium temperature, the dipolar coupling strengths among the two linked spins, DM and KSEA coupling parameters, and the intensity of the homogeneous magnetic field. The findings reveal that the non-classical correlations seen between two linked spins may be adjusted by changing the dipolar interaction coupling strengths between the coupled spins, the intensity of KSEA interaction and the strength of the homogeneous magnetic field B. In addition, our findings demonstrate that the skew information correlations tolerate thermal noise better than entanglement and that LQU and UIN quantifiers disclose more non-classical correlations beyond the LN in the dipole–dipole two-spin system. Our findings also confirm that the UIN is more resistant than the LQU against rising temperatures.

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Authors and Affiliations

  1. Laboratory of High Energy Phys and Condensed Matter, Department of Physics, Faculty des Sciences Aïn Chock, Hassan II University, Casablanca, 20100, Morocco

    Samira Elghaayda & Mostafa Mansour

  2. Department of Physics, Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt

    Ahmad N. Khedr & Mahmoud Tammam

  3. Deanship of Graduate Studies and Research, Ahlia University, Manama, Kingdom of Bahrain

    Mahmoud Abdel-Aty

  4. Mathematics Department, Faculty of Science, Sohag University, Sohag, 82524, Egypt

    Mahmoud Abdel-Aty

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  1. Samira Elghaayda
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Elghaayda, S., Khedr, A.N., Tammam, M. et al. Quantum entanglement versus skew information correlations in dipole–dipole system under KSEA and DM interactions. Quantum Inf Process 22, 117 (2023). https://doi.org/10.1007/s11128-023-03866-w

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