中国物理B ›› 2005, Vol. 14 ›› Issue (11): 2320-2324.doi: 10.1088/1009-1963/14/11/029

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Effect of external noise on the dynamical localization of two coupling electrons in quantum dot array

何安民, 段素青, 赵宪庚   

  1. Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • 收稿日期:2005-05-26 修回日期:2005-07-20 出版日期:2005-11-20 发布日期:2005-11-20
  • 基金资助:
    Project supported in part by the National Natural Science Foundations of China (Grant No 10274007), and a grant of the China Academy of Engineering and Physics.

Effect of external noise on the dynamical localization of two coupling electrons in quantum dot array

He An-Min (何安民), Duan Su-Qing (段素青), Zhao Xian-Geng (赵宪庚)   

  1. Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • Received:2005-05-26 Revised:2005-07-20 Online:2005-11-20 Published:2005-11-20
  • Supported by:
    Project supported in part by the National Natural Science Foundations of China (Grant No 10274007), and a grant of the China Academy of Engineering and Physics.

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摘要： The effect of external noise, which is characterized by an Ornstein--Uhlenbeck process, on the dynamical localization of two coupling electrons in a quantum dot array under the action of an ac electric field is studied. A numerical solution of the stochastic equations is obtained by averaging over stochastic trajectories. The results show that the external noise may destroy the dynamical localization, but the anti-noise capacity of the system is stronger when the two electrons are localized at the ends of the quantum dot array.

Abstract: The effect of external noise, which is characterized by an Ornstein--Uhlenbeck process, on the dynamical localization of two coupling electrons in a quantum dot array under the action of an ac electric field is studied. A numerical solution of the stochastic equations is obtained by averaging over stochastic trajectories. The results show that the external noise may destroy the dynamical localization, but the anti-noise capacity of the system is stronger when the two electrons are localized at the ends of the quantum dot array.

Key words: quantum dot, dynamical localization, external noise

中图分类号:  (Quantum dots)

  • 73.21.La