Controllability of multi-partite quantum systems and selective excitation of quantum dots

Abstract

We consider the degrees of controllability of multi-partite quantum systems as well as necessary and sufficient criteria for each case. The results are applied to the problem of simultaneous control of an ensemble of quantum dots with a single laser pulse. Finally, we apply optimal control techniques to demonstrate selective excitation of individual dots for a simultaneously controllable ensemble.

arXiv commentrevised and expanded version, ca 12 pages IoP latex, 4 figures, to appear in J Opt B

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