2010/04/01 by D. V. Khomitsky, E. Ya. Sherman · 15 citations
Engineering · Physics and Astronomy · #Charge (physics) #Charge density #Condensed matter physics #Coupling (piping) #Electron #Materials science #Molecular Junctions and Nanostructures #Physics #Quantum #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum tunnelling #Qubit #Semiconductor Quantum Structures and Devices #Spin (aerodynamics) #Spin engineering #Spin polarization #Spin–orbit interaction #cond-mat.mes-hall
paper · pdf · doi:10.1209/0295-5075/90/27010
published in Europhysics Letters (EPL) 90(2), 27010 (Institute of Physics) · 6 figures
openalex publication_date 2010/04/01 · arxiv created 2010/09/25 · arxiv updated 2010/09/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.