Exploiting the non-Markovian nature of carrier-phonon dynamics : Multi-pulse control of decoherence in quantum dots

Titelangaben

Machnikowski, Paweł ; Axt, Vollrath Martin ; Kuhn, Tilmann ; Jacak, L.:
Exploiting the non-Markovian nature of carrier-phonon dynamics : Multi-pulse control of decoherence in quantum dots.
In: Saraniti, Marco ; Ravaioli, U. (Hrsg.): Nonequilibrium carrier dynamics in semiconductors : proceedings of the 14th international conference, July 25 - 29, 2005, Chicago, USA. - Berlin : Springer , 2006 . - S. 49-53 . - (Springer Proceedings in Physics ; 110 )
ISBN 978-3-540-36588-4
DOI: https://doi.org/10.1007/978-3-540-36588-4_12

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Abstract

We show that pure dephasing of an exciton in a quantum dot may be reduced by performing the optical excitation with a series of ultrafast pulses. De- phasing may considerably decrease already for a few pulses. In terms of the result- ing coherence vs. control time, a multi-pulse approach is often more efficient than using smooth (Gaussian) pulses. These results show that a significant reduction of dephasing is achievable even with relatively limited experimental resources.