Volume 90, Number 2, April 2010
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||20 May 2010|
Pulse-pumped double quantum dot with spin-orbit coupling
Department of Physics, University of Nizhny Novgorod - 23 Gagarin Avenue, 603950 Nizhny Novgorod, Russian Federation
2 Department of Physical Chemistry, Universidad del País Vasco - 48080 Bilbao, Spain, EU
3 Basque Foundation for Science IKERBASQUE - 48011, Bilbao, Spain, EU
Corresponding author: firstname.lastname@example.org
Accepted: 15 April 2010
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.
PACS: 73.63.Kv – Electronic transport in nanoscale materials and structures: Quantum dots / 72.25.Dc – Spin polarized transport in semiconductors / 72.25.Pn – Current-driven spin pumping
© EPLA, 2010
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