Coherent manipulation of electronic states in a double quantum dot

Details Coherent manipulation of electronic states in a double quantum dot Coherent manipulation of electronic states in a double quantum dot

2003-08-19

arxiv.org/abs/cond-mat/0308362v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

RevTeX

Scientific paper

10.1103/PhysRevLett.91.226804

We investigate coherent time-evolution of charge states (pseudo-spin qubit) in a semiconductor double quantum dot. This fully-tunable qubit is manipulated with a high-speed voltage pulse that controls the energy and decoherence of the system. Coherent oscillations of the qubit are observed for several combinations of many-body ground and excited states of the quantum dots. Possible decoherence mechanisms in the present device are also discussed.

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