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Tailoring Quantum Correlations of a Coupled Central Two Qubits Soaked in a Finite Temperature Antiferromagnetic Environment with Frequency Gap
Mesoscopic and Multilayer Structures Laboratory, Department of Physics, University of Dschang, Dschang, Cameroon
Department of Thermal Engineering and Energy, Douala University Institute of Technology, Douala, Cameroon
Mesoscopic and Multilayer Structures Laboratory, Department of Physics, University of Dschang, Dschang, Cameroon
Department of Physics, University of Buea, Buea, Cameroon
Mesoscopic and Multilayer Structures Laboratory, Department of Physics, University of Dschang, Dschang, Cameroon
- 1 Mesoscopic and Multilayer Structures Laboratory, Department of Physics, University of Dschang, Dschang, Cameroon
- 2 Department of Thermal Engineering and Energy, Douala University Institute of Technology, Douala, Cameroon
- 3 Mesoscopic and Multilayer Structures Laboratory, Department of Physics, University of Dschang, Dschang, Cameroon
- 4 Department of Physics, University of Buea, Buea, Cameroon
- 5 Mesoscopic and Multilayer Structures Laboratory, Department of Physics, University of Dschang, Dschang, Cameroon
Journal of Quantum Information Science·Volume 04 (2014)·Pages 201–213·Published 18 December 2014·DOI10.4236/jqis.2014.44019
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Abstract
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.
KeywordsAnti-Ferromagnetic LatticeAnisotropy FieldMagnetic FieldQuantum CorrelationsCentral Two Qubits
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