Session X44: Focus Session: Nanoscale Transport - Molecules III
8:00 AM–11:00 AM, Friday, March 9, 2007
Colorado Convention Center Room: 507
Sponsoring Unit:
DMP
Chair: Mark Hybertsen, Brookhaven National Laboratory
Abstract ID: BAPS.2007.MAR.X44.11
Abstract: X44.00011 : Full Counting Statistics for a Single-Electron Transistor: Nonequilibrium Effects at Intermediate Conductance
10:24 AM–10:36 AM
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Abstract 
Authors:
Yasuhiro Utsumi
Dimitri Golubev
(Institut f\"ur Theoretische Festk\"operphysik, Universit\"at Karlsruhe)
Gerd Sch\"on
(Institut f\"ur Theoretische Festk\"operphysik, Universit\"at Karlsruhe)
We calculate the probability distribution of current for a single-electron transistor (SET) with intermediate strength conductance where quantum fluctuations of the charge play a dominant role. The calculations are based on the multichannel anisotropic Kondo model in the Majorana representation and the fermionic Keldysh generating functional. The effects of quantum fluctuations are taken into account by the summation of a certain subclass of diagrams, which corresponds to the leading logarithmic approximation in the sense that the result is consistent with the RG analysis. We have shown that in non-equilibrium situations quantum fluctuations of the charge induce lifetime broadening for the charge states of the central island. Consequences which can be detected in experiments include a suppression of the probability of currents larger than the average value. Y. Utsumi, D. Golubev, G. Schoen; PRL. 96, 086803 (2006)
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2007.MAR.X44.11