2006/05/31 by C. W. Groth, B. Michaelis, C. W. J. Beenakker · 1 citation
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.74.125315
published as Phys. Rev. B 74, 125315 (2006) · 4 pages, 2 figures
arxiv created 2007/05/25 · arxiv updated 2009/12/01
Destructive interference of single-electron tunneling between three quantum dots can trap an electron in a coherent superposition of charge on two of the dots. Coupling to external charges causes decoherence of this superposition, and in the presence of a large bias voltage each decoherence event transfers a certain number of electrons through the device. We calculate the counting statistics of the transferred charges, finding a crossover from sub-Poissonian to super-Poissonian statistics with increasing ratio of tunnel and decoherence rates.