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

Abstract

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

6 pages, 5 figs

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• All-electronic coherent population trapping in quantum dots
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• Steady-state solution for dark states using a three-level system in coupled quantum dots
• Survival probability of the Grover walk on the ladder graph