Hannover 2010 – scientific programme

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SYDC: Symposium Decoherence in the light of modern experiments

SYDC 2: Decoherence in the Light of Modern Experiments II

SYDC 2.2: Invited Talk

Tuesday, March 9, 2010, 17:00–17:30, E 415

Decoherence in fermionic interferometers — •Florian Marquardt — Friedrich-Alexander Universität Erlangen-Nürnberg und Max-Planck Institut für die Physik des Lichts

Interference experiments with electrons in solids represent a powerful tool to learn about decoherence and interaction effects. In contrast to interferometers based on single photons, neutrons, atoms or molecules, many-body effects play an essential role. In this talk I will discuss some aspects of the decoherence of electrons. In particular, I will describe the electronic Mach-Zehnder interferometer that is based on electrons traveling chirally along edge channels in the quantum Hall effect regime. We find that, in the appropriate regime, the loss of phase coherence obeys a power-law decay with a universal exponent, independent of the details of the interaction potential.