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

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.