Regensburg 2007 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 32: Fluctuations and Noise

TT 32.3: Vortrag

Donnerstag, 29. März 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.