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
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.
Received: 13 November 2003
Accepted manuscript online:
PACS:
73.21.La
(Quantum dots)
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10075032).
Cite this article:
Zhao Hua (赵华), Zhang Guo-Feng (张国锋), Yin Wen (殷雯), Liang Jiu-Qing (梁九卿) Spin current in double quantum dot 2004 Chinese Physics 13 938
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