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.
Received: 26 May 2005
Revised: 20 July 2005
Accepted manuscript online:
PACS:
73.21.La
(Quantum dots)
Fund: 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.
Cite this article:
He An-Min (何安民), Duan Su-Qing (段素青), Zhao Xian-Geng (赵宪庚) Effect of external noise on the dynamical localization of two coupling electrons in quantum dot array 2005 Chinese Physics 14 2320
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