Regensburg 2007 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 28: Transport - Poster Session
TT 28.34: Poster
Donnerstag, 29. März 2007, 14:00–17:45, Poster A
Full Counting Statistics from quantum trajectories — •Ansgar Pernice1 and Walter Strunz2 — 1Physikalisches Institut der Universität Freiburg, Herrmann-Herder-Str. 3,79104 Freiburg, Germany — 2Physikalisches Institut der Universität Freiburg, Herrmann-Herder-Str. 3,79104 Freiburg, Germany
Motivated by a recent experiment [1], we apply a quantum trajectory approach to the determination of the full counting statistics (FCS)of single-electron transport in a quantum dot.
The FCS reveals information about the initial state of the dot [2]. In the case of the steady state, our results coincide with the formulae given by Bagrets and Nazarov [3]. However, the FCS differs in the case of an initially full/empty dot and for short times.
Last but not least, we establish the connection between our approach and those based on counting fields in providing a new deriviation of the quantum-jump-representation, here for a fermionic environment.
[1] S. Gustavsson, R. Leturcq, B. Simovic, R. Schleser, T. Ihn, P. Studerus, and K. Ensslin, Phys. Rev. 96, 076605 (2006)
[2] H. Schaefers and W. T. Strunz, Phys. Rev. B 71, 075321 (2005).
[3] D. A. Bagrets and Yu. V. Nazarov, Phys. Rev. B 67, 085316 (2003).