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Entanglement of a two-qubit anisotropic Heisenberg X Y Z chain in nonuniform magnetic fields with intrinsic decoherence 被引量:3

Entanglement of a two-qubit anisotropic Heisenberg X Y Z chain in nonuniform magnetic fields with intrinsic decoherence
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摘要 Taking the intrinsic decoherence effect into account, this paper investigates the entanglement of a two-qubit anisotropic Heisenberg XYZ model in the presence of nonuniform external magnetic fields by employing the concurrence as entanglement measure. It is found that both the intrinsic decoherence and the anisotropy of the system give a significant suppression to the entanglement. Moreover it finds that the initial state of the system plays an important role in the time evolution of the entanglement, which means that the entanglement of the system is independent of the nonuniformity and uniformity of the magnetic field when the system is in the initial state |ψ (0)) = |00) and [ψ′ (0)) = m |01) + n |10), respectively. Taking the intrinsic decoherence effect into account, this paper investigates the entanglement of a two-qubit anisotropic Heisenberg XYZ model in the presence of nonuniform external magnetic fields by employing the concurrence as entanglement measure. It is found that both the intrinsic decoherence and the anisotropy of the system give a significant suppression to the entanglement. Moreover it finds that the initial state of the system plays an important role in the time evolution of the entanglement, which means that the entanglement of the system is independent of the nonuniformity and uniformity of the magnetic field when the system is in the initial state |ψ (0)) = |00) and [ψ′ (0)) = m |01) + n |10), respectively.
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2008年第2期456-461,共6页 中国物理B(英文版)
基金 Project supported by the State Key Development Program for Basic Research of China (Grant No 2006CB921604) the National Natural Science Foundation of China (Grant Nos 60708003,60578050 and 10434060)
关键词 Heisenberg XYZ chain CONCURRENCE magnetic field intrinsic decoherence Heisenberg XYZ chain, concurrence, magnetic field, intrinsic decoherence
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