Control of electron spin and orbital resonance in quantum dots through spin-orbit interactions

Details Control of electron spin and orbital resonance in quantum dots through spin-orbit interactions Control of electron spin and orbital resonance in quantum dots through spin-orbit interactions

2006-11-08

arxiv.org/abs/cond-mat/0611228v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 5 figures; v2: introduction and conclusions broadened, moderate structure and content changes

Scientific paper

Influence of resonant oscillating electromagnetic field on a single electron in coupled lateral quantum dots in the presence of phonon-induced relaxation and decoherence is investigated. Using symmetry arguments it is shown that spin and orbital resonance can be efficiently controlled by spin-orbit interactions. The control is possible due to the strong sensitivity of Rabi frequency to the dot configuration (orientation of the dot and a static magnetic field) as a result of the anisotropy of the spin-orbit interactions. The so called easy passage configuration is shown to be particularly suitable for magnetic manipulation of spin qubits, ensuring long spin relaxation time and protecting the spin qubit from electric field disturbances accompanying on-chip manipulations.

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