中国物理B ›› 2004, Vol. 13 ›› Issue (6): 938-941.doi: 10.1088/1009-1963/13/6/026

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Spin current in double quantum dot

赵华1, 梁九卿1, 张国锋2, 殷雯2   

  1. (1)Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China; (2)Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China; State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2003-11-13 出版日期:2004-07-05 发布日期:2005-07-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10075032).

Spin current in double quantum dot

Zhao Hua (赵华)a, Zhang Guo-Feng (张国锋)ab, Yin Wen (殷雯)ab, Liang Jiu-Qing (梁九卿)a   

  1. a Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China; b State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2003-11-13 Online:2004-07-05 Published:2005-07-05
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10075032).

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摘要： We have studied the dynamical behaviours of two electrons confined in a double quantum dot driven by rotating magnetic fields in terms of the theory of Lewis－Riesenfeld Hermitian invariants for the explicitly time-dependent Hamiltonian. The coherent spin oscillations in the dot provide a generation source for spin current. Exact solutions obtained allow us to investigate the dynamical properties of the spin localization for various initial localized states.

关键词: spin current, quantum dot, time-dependent transformation

Abstract: We have studied the dynamical behaviours of two electrons confined in a double quantum dot driven by rotating magnetic fields in terms of the theory of Lewis－Riesenfeld Hermitian invariants for the explicitly time-dependent Hamiltonian. The coherent spin oscillations in the dot provide a generation source for spin current. Exact solutions obtained allow us to investigate the dynamical properties of the spin localization for various initial localized states.

Key words: spin current, quantum dot, time-dependent transformation

中图分类号:  (Quantum dots)

  • 73.21.La