Full counting statistics of nano-electromechanical systemsC. Flindt1, T. Novotný1, 2 and A.-P. Jauho1
1 MIC, Department of Micro and Nanotechnology, Technical University of Denmark DTU, Building 345east - DK-2800 Kongens Lyngby, Denmark
2 Department of Electronic Structures, Faculty of Mathematics and Physics Charles University - Ke Karlovu 5, 121 16 Prague, Czech Republic
received 14 October 2004; accepted 18 November 2004
published online 24 December 2004
We develop a theory for the full counting statistics (FCS) for a class of nanoelectromechanical systems (NEMS), describable by a Markovian generalized master equation. The theory is applied to two specific examples of current interest: vibrating -molecules and quantum shuttles. We report a numerical evaluation of the first three cumulants for the setup; for the quantum shuttle we use the third cumulant to substantiate that the giant enhancement in noise observed at the shuttling transition is due to a slow switching between two competing conduction channels. Especially the last example illustrates the power of the FCS.
85.85.+j - Micro- and nano-electromechanical systems (MEMS/NEMS) and devices.
72.70.+m - Noise processes and phenomena.
73.23.Hk - Coulomb blockade; single-electron tunneling.
© EDP Sciences 2005