| 互感效应对磁通量子比特消相干影响的研究 |
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| 引用本文： | 周腾飞,陈志铨,江燕燕,嵇英华.互感效应对磁通量子比特消相干影响的研究[J].量子电子学报,2008,25(6):703-711. |
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| 作者姓名： | 周腾飞 陈志铨 江燕燕 嵇英华 |
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| 作者单位： | 1. 江西师范大学物理与通信电子学院,江西,南昌,330022
2. 江西师范大学物理与通信电子学院,江西,南昌,330022;安庆师范学院物理系,安徽,安庆,246011 |
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| 基金项目： | 江西省自然科学基金
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| 摘 要： | 量子计算需要保持量子态的相干和纠缠特性,但这两个特性都很容易遭到消相干过程的破坏,因此如何克服消相干成为实现量子计算的一个关键.利用经典电路图论,得出了磁通偏置超导电路的哈密顿量,再利用Bloch-Redfield方程研究了超导电路多能级系统的动力学演化,最后在二能级近似下,发现了电路之间的互感对系统谱密度的影响,并讨论了如何调节电路之间的各个互感,减小磁通量子比特的消相干时间.
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| 关 键 词： | 量子光学 消相干 电路图论 互感 |
| 收稿时间： | 2008/1/17 |
Mutual inductance's influence on the decoherence of flux qubit |
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| ZHOU Teng-fei,CHEN Zhi-quan,JIANG Yan-yan,JI Ying-hua.Mutual inductance's influence on the decoherence of flux qubit[J].Chinese Journal of Quantum Electronics,2008,25(6):703-711. |
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| Authors: | ZHOU Teng-fei CHEN Zhi-quan JIANG Yan-yan JI Ying-hua |
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| Affiliation: | ZHOU Teng-fei~1 CHEN Zhi-quan~1 JIANG Yan-yan~(1,2) JI Ying-hua~1 1 College of Physics , Communication Electronics,Jiangxi Normal University,Nanchang 330022,China 2 Department of Physics,Anqing Teachers College,Anqing 246011,China |
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| Abstract: | The quantum computation needs to maintain the quantum state coherent and the entanglement, but these two characteristics are very easy to be destructed by the decoherent process,therefore,how to overcome the effect of decoherence is the key to implement quantum computation.The Hamiltonian of the superconducting circuit was derived from circuit graph theory,and multilevel dissipative dynamics was studied by the Bloch-Redfield function.Finally,under two-level approximation,the influence of mutual inductance o... |
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| Keywords: | quantum optics decoherence circuit graph theory mutual inductance |
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