二维J1-J2模型中四量子比特的热纠缠特性
이유J1-J2모형중사양자비특적열규전특성
The Four-qubit Thermal Entanglement in a Two-dimensional J1 - J2 model
  • 万方数据
    量子光学学报 양자광학학보
    ACTA SINICA QUANTUM OPTICA
    2008年 2期 174-178 ,共5页

    郭克涛%符力平%王飞

    곽극도%부력평%왕비

    热纠缠%J1-J2模型 熱糾纏%J1-J2模型
    열규전%J1-J2모형
    thermal entanglement%J1 - J2 model
    我们研究了二维.J1-J2模型中三种四量子比特的热纠缠特性,结果发现,临界温度基本上随挫变参量α的增大而减小.我们也发现,通过选择合适的挫变参量α可以制备最大纠缠态.
    아문연구료이유.J1-J2모형중삼충사양자비특적열규전특성,결과발현,림계온도기본상수좌변삼량α적증대이감소.아문야발현,통과선택합괄적좌변삼량α가이제비최대규전태.
    We have investigated the thermal entanglement properties of three cases of four qubits in a two-dimension-al J1 - J2 model by calculating the pairwise concurrence. It is found that the critical temperature where the entangle-ment vanishes almost decreases with the increase of the frustration parameter or. We have, also, found that the maxi-mally entangled states can be generated in the third case by choosing the proper frustration parameter α.
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