Dresden 2009 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 21: Transport: Fluctuations and Noise
TT 21.2: Vortrag
Dienstag, 24. März 2009, 14:30–14:45, HSZ 304
Electron counting with a two-particle emitter — •Janine Splettstoesser1, Sveta Ol’khovskaya2, Michael Moskalets1,2, and Markus Büttiker1 — 1Département 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.