Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2002-07-25
Phys. Rev. B 67, 085316 (2003)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
17 pages, 16 figures
Scientific paper
10.1103/PhysRevB.67.085316
Full counting statistics (FCS) of charge transfer in mesoscopic systems has recently become a subject of significant interest, since it proves to reveal an important information about the system which can be hardly assessed by other means. While the previous research mostly addressed the FCS of non- interacting systems, the present paper deals with the FCS in the limit of strong interaction. In this Coulomb blockade limit the electron dynamics is known to be governed by a master equation. We develop a general scheme to evaluate the FCS in such case, this being the main result of the work presented. We illustrate the scheme, by applying it to concrete systems. For generic case of a single resonant level we establish the equivalence of scattering and master equation approach to FCS. Further we study a single Coulomb blockade island with two and three leads attached and compare the FCS in this case with our recent results concerning an open dot either with two and three terminals. We demonstrate that Coulomb interaction suppresses the relative probabilities of large current fluctuations.
Bagrets Dmitry A.
Nazarov Yu. V.
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