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Verhandlungen
Verhandlungen
DPG

Dresden 2009 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 21: Transport: Fluctuations and Noise

TT 21.2: Talk

Tuesday, March 24, 2009, 14:30–14:45, HSZ 304

Electron counting with a two-particle emitter — •Janine Splettstoesser1, Sveta Ol’khovskaya2, Michael Moskalets1,2, and Markus Büttiker11Département de Physique Théorique, Université de Genève, CH-1211 Genève, Switzerland — 2Department of Metal and Semiconductor Physics, NTU "Kharkiv Polytechnic Institute", 61002 Kharkiv, Ukraine

Recently an on-demand coherent single-electron source has been realized experimentally giving the possibility of initializing quantum states for, e.g., electronic quantum information. However, a suitable setup for high-speed single-electron detection is still missing. We consider two driven cavities (capacitors) connected in series via an edge state. The cavities are driven such that they emit an electron and a hole in each cycle. Depending on the phase lag the second cavity can effectively absorb the carriers emitted by the first cavity and nullify the total current or the set-up can be made to work as a two-particle emitter. We examine the precision with which the current can be nullified and with which the second cavity effectively counts the particles emitted by the first one.

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