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Phys. Rev. B 80, 235321 (2009) [7 pages]

Three-level mixing and dark states in transport through quantum dots

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Clive Emary, Christina Pöltl, and Tobias Brandes
Institut für Theoretische Physik, TU Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany

Received 27 August 2009; revised 26 October 2009; published 16 December 2009

We consider theoretically the transport through the double quantum dot structure of the recent experiment of Payette et al. [ Phys. Rev. Lett. 102 026808 (2009)] and calculate stationary current and shot noise. Three-level mixing gives rise to a pronounced current-suppression effect, the character of which changes markedly with bias direction. We discuss these results in connection with the dark states of coherent population trapping in quantum dots.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.80.235321
DOI:
10.1103/PhysRevB.80.235321
PACS:
73.63.Kv, 73.50.Td, 73.23.Hk