J4 ›› 2015, Vol. 32 ›› Issue (5): 573-580.

• 量子光学 • 上一篇    下一篇

超导电荷量子比特系统中几何量子失协和稠密编码的研究

王飞, 麦麦提依明•吐孙, 阿孜古丽•热合曼, 阿力米提•阿布力孜, 帕肉克•帕尔哈提, 艾合买提•阿不力孜   

  1. 新疆师范大学物理与电子工程学院, 新疆 乌鲁木齐 830054
  • 收稿日期:2014-12-05 修回日期:2015-01-19 出版日期:2015-09-28 发布日期:2015-09-28
  • 通讯作者: 艾合买提?阿不力孜,新疆轮台人,博士,教授,硕士生导师,主要从事于量子信息和量子计算的研究. E-mail:aahmad@126.com
  • 作者简介:王飞(1988-)甘肃天水人,研究生,主要从事于量子信息和量子计算的研究.E-mail:wang1447206487fei@163.com
  • 基金资助:

    新疆维吾尔自治区自然科学基金项目(2012211A052)

Geometric Quantum Discord and Dense Coding in the Superconducting Charge Qubit System

Wang Fei, Maimaitiyiming Tusun, Aziguli Reheman,Ablimit Ablez,Parouke Paerhati, Ahmad Abliz   

  1. School of Physics and Electronic Engineering, Xinjiang Normal University, Urumchi 830054, China
  • Received:2014-12-05 Revised:2015-01-19 Published:2015-09-28 Online:2015-09-28

摘要:

研究了由约瑟夫森大结耦合的两个超导电荷量子比特模型中的几何量子失协和稠密编码信道容量。讨论了初始平均光子数、相对相位和两电荷量子比特间振幅对几何量子失协和稠密编码信道容量的影响。结果表明,初始平均光子数、相对相位和两电荷量子比特间振幅在几何量子失协及稠密编码信道容量的动力学演化过程中扮演了一个非常重要的角色,特别有意义的是可以通过调控相对相位来提高稠密编码信道容量的值。

关键词: 超导电荷量子比特, 几何量子失协, 量子稠密编码, 信道容量

Abstract:

Geometric quantum discord as well as dense coding capacity are studied in a model where two superconducting charge qubits are coupled with a large Josephson junction. The influence of the initial mean photon number, the relative phase and the amplitude of the two qubits on the time evolution of geometric quantum discord and the dense coding capacity is studied. The results show that the initial mean photon number, the relative phase and the amplitude of the two qubits may play an important role in the evolution of geometric quantum discord and the dense coding capacity. Importantly, the dense coding channel capacity can be increased via changing the relative phases.

Key words: superconducting charge qubit, geometric quantum discord, quantum dense coding, channel capacity

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