| 非均匀磁场中的海森堡XY模型热纠缠信道的量子隐形传送 |
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| 引用本文： | 沙金巧,方建兴.非均匀磁场中的海森堡XY模型热纠缠信道的量子隐形传送[J].量子光学学报,2009,15(3). |
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| 作者姓名： | 沙金巧 方建兴 |
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| 作者单位： | 1. 苏州科技学院数理学院,江苏,苏州,215009
2. 苏州大学物理科学与技术学院,江苏,苏州,215006 |
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| 摘 要： | 在量子通讯的实验中,由于外界环境的影响,我们很难得到最大的纠缠纯态.量子信道可能以混合纠缠态的形式出现.而固体材料中的热平衡态就是一种重要的混合纠缠态.本文利用了两个独立的外加不均匀磁场的一维海森堡链的热纠缠态作为量子信道,实现了两粒子纠缠态的远程传送,分析了外界温度和磁场对纠缠和传输保真度的影响.为了突出传输效果,我们对平均保真度做了研究,结果发现当温度很低,外加反方向的磁场B1和B2时,平均保真度大于经典通道的传输极限值2/3.
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| 关 键 词： | 量子纠缠 隐形传送 海森堡链 |
Quantum Teleportation through the Channel of Thermal Mixed States in Two Independent Heisenberg Chains |
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| SHA Jin-qiao,FANG Jian-xing.Quantum Teleportation through the Channel of Thermal Mixed States in Two Independent Heisenberg Chains[J].Acta Sinica Quantum Optica,2009,15(3). |
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| Authors: | SHA Jin-qiao FANG Jian-xing |
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| Institution: | 1.School of Mathematics and physics;Suzhou University of Science and Technology;Jiangsu;Suzhou 215009;China;2.School of Physics and Technology;Soochow University;Suzhou 215006;China |
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| Abstract: | In the experiment of quantum communication,maximal entangled pure states are difficult to got due to the effects of environment.Therefore,a quantum channel is always represented by a form of mixed states.The thermal equilibrium state in solid state materials is one essential mixed entangled state.In this dissertation,a two-particle entangled state can be teleported through the channel of thermal mixed states in two independent 1D Heisenberg chains.We study the effects of the non-uniform external magnetic fi... |
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| Keywords: | quantum entanglement teleportation Heisenberg chain |
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