Reducing decoherence of the confined exciton state in a quantum dot by pulse-sequence control
arXiv:cond-mat/0408322 · doi:10.1103/PhysRevB.71.155305
Abstract
We study the phonon-induced dephasing of the exciton state in a quantum dot excited by a sequence of ultra-short pulses. We show that the multiple-pulse control leads to a considerable improvement of the coherence of the optically excited state. For a fixed control time window, the optimized pulsed control often leads to a higher degree of coherence than the control by a smooth single Gaussian pulse. The reduction of dephasing is considerable already for 2-3 pulses.
arXiv commentFinal version (moderate changes)
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