Pulse-pumped double quantum dot with spin-orbit coupling

Details Pulse-pumped double quantum dot with spin-orbit coupling Pulse-pumped double quantum dot with spin-orbit coupling

2010-09-25

arxiv.org/abs/1009.5013v1

Europhysics Letters 90, 27010, 2010

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 figures

Scientific paper

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.

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