Enhanced thermal entanglement in an anisotropic Heisenberg XYZ chain

Journal Article · Fri Aug 01 00:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.68.024301· OSTI ID:20640110

Zhou, L; Song, H S; Guo, Y Q; Li, C ^[1]

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1. Department of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China (China)

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}.

• OSTI ID: 20640110
• Journal Information: Physical Review. A, Vol. 68, Issue 2; Other Information: DOI: 10.1103/PhysRevA.68.024301; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
36 MATERIALS SCIENCE
ANISOTROPY
BASIC INTERACTIONS
CORRELATIONS
CRITICAL TEMPERATURE
ENERGY LEVELS
HEISENBERG MODEL
MAGNETIC FIELDS
QUANTUM MECHANICS
SPIN