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arXiv:cond-mat/0609164 · The European Physical Journal B

Phonon-induced decoherence and dissipation in donor-based charge qubits

Jens Eckel, S. Weiss, Michael Thorwart

Published Sep 1, 2006• 19 citations
arXivHTMLPDF
DOI
10.1140/epjb/e2006-00346-y

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The entanglement dynamics of a pair of donor-based charge qubits is obtained in analytical form. The disentanglement is induced by off resonant scattering of acoustical phonons in the semiconductor host. According to our results a rather unusual recovery of entanglement occurs that depends on the geometrical configuration of the qubits. In addition, for large times a non-vanishing stationary entanglement is predicted. For the cases of one and two initial excitations a simple kinetic interpretation allows for an adequate analysis of the observed dynamics. Our results also reveal a direct relation between the disentanglement rate and the inter-donor decoherence rates.