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arxiv: cond-mat/0308362 · v1 · submitted 2003-08-19 · ❄️ cond-mat.mes-hall

Coherent manipulation of electronic states in a double quantum dot

Toshiaki Hayashi , Toshimasa Fujisawa , Hai-Du Cheong , Yoon-Ha Jeong , Yoshiro Hirayama This is my paper
classification ❄️ cond-mat.mes-hall
keywords coherentquantumqubitstatesdecoherencedoublechargecombinations
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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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