Spin current in double quantum dot

• 来源期刊: 中国物理（英文版）
• 关键词: spin current quantum dot time-dependent transformation
• 年，卷（期）: 2004,（6）
• 页码范围: 938-941
• 页数: 4页
• 语种: 英文

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.