ENHANCED THERMAL ENTANGLEMENT IN AN ANISOTROPIC HEISENBERG XYZ CHAIN

By Ling Zhou, He-Shan Song, Y. Guo, C. Li. 2003

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The thermal entanglement in the Heisenberg XYZ chain is investigated in the presence of an external magnetic field B. In the two-qubit system, the critical magnetic field B{sub c} is increased by introducing the interaction of the z component of two neighboring spins J{sub z}. This interaction not only improves the critical temperature T{sub c}, but also enhances the entanglement for a particular fixed B. We also analyze the pairwise entanglement between nearest neighbors in three qubits. The pairwise entanglement, for a fixed T, can become strong by controlling B and J{sub z}.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/5cdd3b4c578253af60a55ca462862685c640c1eb