Decoherence effects on the generation of exciton entangled states in coupled quantum dots

Abstract

We report on exciton-acoustic-phonon coupling effects on the generation of exciton maximally entangled states in N=2 and 3 quantum dot systems. In particular, we address the question of the combined effect of laser pulses, appropriate for generating Bell and Greenberger-Horne-Zeilinger entangled states, together with decoherence mechanisms as provided by a phonon reservoir. By solving numerically the master equation for the optically driven exciton-phonon kinetics, we show that the generation of maximally entangled exciton states is preserved over a reasonable parameter window.

Work presented at the Sixth International conference on the Optics of Excitons in Confined Systems, Ascona, Switzerland Aug. 30-Sept. 2, 1999

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