Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-05-25
Phys. Rev. B 74, 125315 (2006)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 2 figures
Scientific paper
10.1103/PhysRevB.74.125315
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.
Beenakker C. W. J.
Groth C. W.
Michaelis Björn
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