Pulse-pumped double quantum dot with spin-orbit coupling

作者：Khomitsky D V^*; Sherman E Ya

来源：EPL, 2010, 90(2): 27010.

DOI：10.1209/0295-5075/90/27010

We consider the full driven quantum dynamics of a qubit realized as spin of electron in a one-dimensional double quantum dot with spin-orbit coupling. The driving perturbation is taken in the form of a single half-period pulse of electric field. Spin-orbit coupling leads to a nontrivial evolution in the spin and charge densities making the dynamics in both quantities irregular. As a result, the charge density distribution becomes strongly spin-dependent. The transition from the field-induced tunneling to the strong-coupling regime is clearly seen in the charge and spin channels. These results can be important for the understanding of the techniques for the spin manipulation in nanostructures.

• 出版日期2010-4