Abstract

AHADPOUR, S.  and  MIRMASOUDI, F.. Thermal quantum correlations of spin chain with multiple interactions. Rev. mex. fis. [online]. 2020, vol.66, n.5, pp.692-699.  Epub Jan 31, 2022. ISSN 0035-001X.  https://doi.org/10.31349/revmexfis.66.692.

To explore the impact of distance between spins on quantum correlation, we compute trace distance discord and spin squeezing in an anisotropic Heisenberg XYZ model with Dzyaloshinskii-Moriya interaction in the presence of the external magnetic field. It is valuable to investigate how we can protect quantum correlations in a system when the distance between the spins is promoted. We find that rich Dzyaloshinskii-Moriya interaction and low temperature can be effective for quantum correlations with increasing distance between spins as at sufficiently low temperature. Besides, the generated correlated channels are inspected to interchange the information between the system qubits applying the standard dense coding protocol; then, the dense coding capacity of the transmitted information is quantified. It is found that the strength Dzyaloshinskii-Moriya interaction and magnetic field have a great impact on the dynamics of the quantum correlations and, consequently, the quality of the generated channels to exchange the information. Therefore, the effect of Dzyaloshinskii-Moriya interaction for various strengths of temperature needs to be considered to have valid dense coding when the distance of spin increases.

Keywords : Dzyaloshinskii-Moriya; quantum correlation.

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