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Tailoring Quantum Correlations of a Coupled Central Two Qubits Soaked in a Finite Temperature Antiferromagnetic Environment with Frequency Gap

**Author(s)**Leave a comment

Lukong Cornelius Fai

^{1}, Ngwa Engelbert Afuoti^{1,2}, Georges Collince Fouokeng^{1*}, Jules Casimir Ngana Kuetche^{1,3}, Martin Tchoffo^{1}
We revisit the quantum features of an anti-ferromagnetic (AF) spin
environment at finite temperature with gap in its frequency spectrum, on the
dynamics quantum correlations of a coupled central two qubits system with
Dzyaloshinskii-Moriya (DM) interaction, prepared in two entangled Bell states.
Using entanglement and quantum discord as quantum meters of decoherence, the
prepared entangled states are classified as robust or fragile relative to the
degree of information leakage to the AF environment. By tailoring the size of
the frequency gap, anisotropy field strength and induced field, due to system
AF spin environment coupling, size of the AF environment and DM interaction
parameter, a decoherence-free sub-space can be accessed for efficient execution
of quantum protocols encoded in the entangled states.

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Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Fai, L. , Afuoti, N. , Fouokeng, G. , Kuetche, J. and Tchoffo, M. (2014) Tailoring Quantum Correlations of a Coupled Central Two Qubits Soaked in a Finite Temperature Antiferromagnetic Environment with Frequency Gap.

*Journal of Quantum Information Science*,**4**, 201-213. doi: 10.4236/jqis.2014.44019.

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