中国物理B ›› 2012, Vol. 21 ›› Issue (1): 17302-017302.doi: 10.1088/1674-1056/21/1/017302

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Quantum computation with two-dimensional graphene quantum dots

李杰森, 李志兵, 姚道新   

  1. State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China
  • 收稿日期:2011-04-06 修回日期:2011-09-14 出版日期:2012-01-15 发布日期:2012-01-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11074310), the National Basic Research Program of China (Grant No. 2007CB935501), and Fundamental Research Funds for the Central Universities of China.

Quantum computation with two-dimensional graphene quantum dots

Li Jie-Sen(李杰森), Li Zhi-Bing (李志兵), and Yao Dao-Xin (姚道新)†   

  1. State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China
  • Received:2011-04-06 Revised:2011-09-14 Online:2012-01-15 Published:2012-01-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11074310), the National Basic Research Program of China (Grant No. 2007CB935501), and Fundamental Research Funds for the Central Universities of China.

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摘要： We study an array of graphene nano sheets that form a two-dimensional S=1/2 Kagome spin lattice used for quantum computation. The edge states of the graphene nano sheets are used to form quantum dots to confine electrons and perform the computation. We propose two schemes of bang-bang control to combat decoherence and realize gate operations on this array of quantum dots. It is shown that both schemes contain a great amount of information for quantum computation. The corresponding gate operations are also proposed.

关键词: graphene, quantum dot, quantum computation, Kagome lattice

Abstract: We study an array of graphene nano sheets that form a two-dimensional S=1/2 Kagome spin lattice used for quantum computation. The edge states of the graphene nano sheets are used to form quantum dots to confine electrons and perform the computation. We propose two schemes of bang-bang control to combat decoherence and realize gate operations on this array of quantum dots. It is shown that both schemes contain a great amount of information for quantum computation. The corresponding gate operations are also proposed.

Key words: graphene, quantum dot, quantum computation, Kagome lattice

中图分类号:  (Electronic structure of graphene)

  • 73.22.Pr
73.21.La (Quantum dots) 73.22.-f (Electronic structure of nanoscale materials and related systems) 74.25.Jb (Electronic structure (photoemission, etc.))