用三比特海森堡XXZ模型实现量子稠密编码

Dense Coding in a Three-Qubit Heisenberg Spin XXZ Chain

本文主要研究利用各向异性三比特海森堡XXZ模型实现量子稠密编码的理论可行性问题并讨论在有限温度下,xy平面上的耦合常数J,z方向的耦合常数Jz,以及外加磁场对稠密编码信道容量的影响。结果表明,耦合常数J对量子稠密编码信道容量起到积极作用。尽管耦合常数Jz,外加磁场B及温度T均抑制量子稠密编码的信道容量,但是在一定范围内J总可以抵消这些参数的消极作用并提高信道容量。

This paper mainly studied the feasibility of quantum dense coding via a model of three qubit anisotropy Heisenberg XXZ spin chain and discussed the effect of magnetic field intensity B,coupling constant J,Jzand temperature Ton quantum channel capacities of quantum dense coding.Results showed that by increasing the coupling constant Jthe dense coding capacity can be increased effectively.Moreover,Jalso excels the opponents as Jz,Band T which suppresses the dense coding capacity in some areas.