Resonant tunneling and quantum fluctuation in a driven triple-well system

doi:10.1088/1674-1056/19/2/020304

中国物理B ›› 2010, Vol. 19 ›› Issue (2): 20304-020304.doi: 10.1088/1674-1056/19/2/020304

Resonant tunneling and quantum fluctuation in a driven triple-well system

卢伟涛¹, 王顺金¹, 张华²

(1)Department of Physics, Sichuan University, Chengdu 610064, China; (2)Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

收稿日期:2009-04-21 修回日期:2009-05-13 出版日期:2010-02-15 发布日期:2010-02-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos.~10974137 and 10775100).

Resonant tunneling and quantum fluctuation in a driven triple-well system

Lu Wei-Tao(卢伟涛)^a), Wang Shun-Jin(王顺金)^a)†, and Zhang Hua(张华)^b)

^a Department of Physics, Sichuan University, Chengdu 610064, China; ^b Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

Received:2009-04-21 Revised:2009-05-13 Online:2010-02-15 Published:2010-02-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos.~10974137 and 10775100).

摘要/Abstract

摘要： The influence of parameters such as the strength and frequency of a periodic driving force on the tunneling dynamics is investigated in a symmetric triple-well potential. It is shown that for some special values of the parameters, tunneling could be enhanced considerably or suppressed completely. Quantum fluctuation during the tunneling is discussed as well and the numerical results are presented and analysed by virtue of Floquet formalism.

Abstract: The influence of parameters such as the strength and frequency of a periodic driving force on the tunneling dynamics is investigated in a symmetric triple-well potential. It is shown that for some special values of the parameters, tunneling could be enhanced considerably or suppressed completely. Quantum fluctuation during the tunneling is discussed as well and the numerical results are presented and analysed by virtue of Floquet formalism.

Key words: triple-well potential, non-resonant tunneling, resonant tunneling, Floquet theorem, quantum fluctuation

中图分类号: (Tunneling, traversal time, quantum Zeno dynamics)

03.65.Xp

05.40.-a (Fluctuation phenomena, random processes, noise, and Brownian motion)

卢伟涛, 王顺金, 张华. Resonant tunneling and quantum fluctuation in a driven triple-well system[J]. 中国物理B, 2010, 19(2): 20304-020304.

Lu Wei-Tao(卢伟涛), Wang Shun-Jin(王顺金), and Zhang Hua(张华). Resonant tunneling and quantum fluctuation in a driven triple-well system[J]. Chin. Phys. B, 2010, 19(2): 20304-020304.

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Resonant tunneling and quantum fluctuation in a driven triple-well system

Resonant tunneling and quantum fluctuation in a driven triple-well system

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