Regensburg 2010 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 46: Quantum Dots and Wires: Transport
HL 46.9: Vortrag
Mittwoch, 24. März 2010, 16:15–16:30, H17
Quantum Jitter of a single electron source — Adrien Mahé1, François Parmentier1, Erwann Bocquillon1, Jean-Marc Berroir1, Christian Glattli1,2, Takis Kontos1, •Bernard Placais1, and Gwendal Fève1 — 1Laboratoire Pierre Aigrain, ENS, 24 rue Lhomond 75005 Paris, France — 2Service de Physique de l'Etat Condensé, CEA, 91192 Gif-sur-Yvette, France
Coherent ballistic electronic transport along the quantum Hall edge states of two dimensional electron gases bears strong analogies with the propagation of photons, well illustrated in electronic Mach-Zehnder interferometers. The quantum optic variant would be the realization of Hanbury-Brown and Twiss or Hong Ou Mandel experiments where one or few electrons would be coherently manipulated.
The first step toward this goal has been the realization of a single electron emitter based on fast gating of single quantum dot states [1]. This work addresses the second step by demonstrating measurement of the output correlations in the current generated by the source. The first result is the qualification of the single electron source by the absence of multiple events in the shot noise. The second one is the revealing of quantum fluctuations in the emission time. This "quantum jitter" is a high frequency noise that dominates in single electron sources, and constitutes the basic limitation for a future coherent single electronics.
[1] G. Fève, A. Mahé, J.-M. Berroir, T. Kontos, B. Plaçais, D. C. Glattli, A. Cavanna, B. Etienne, Y. Jin, Science 316, 1169 (2007).