Regensburg 2007 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 32: Fluctuations and Noise
TT 32.3: Talk
Thursday, March 29, 2007, 18:30–18:45, H18
Frequency-dependent full counting statistics — Clive Emary1, •David Marcos2, Ramon Aguado2, and Tobias Brandes1 — 1TU Berlin, Sekr. PN 7-1, Institut für Theoretische Physik, Hardenbergstr. 36, D-10623 Berlin, Deutschland — 2Departamento de Teoría de la Materia Condensada, Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (CSIC), C/ Sor Juana Inés de la Cruz, 3, Campus de Cantoblanco, Madrid 28049, Spain
Full Counting Statistics (FCS) is fast becoming one of the most powerful theoretical tools for studying electronic transport through mesoscopic devices. The extra information FCS provides over and above average current and shot-noise measurements, yields greater insight into the behaviour of the system, and in particular particle correlations. Most calculations to date have considered FCS in the zero-frequency, or single-time limit. Here, we describe our technique for calculating arbitrary-order multiple-time current correlators, and hence a fully frequency-dependent FCS. Our formalism is derived within the generalised density matrix approach and is therefore of wide applicability.