Interference and Decoherence of Composite Fermions in the Quantum Hall Effect

In this talk I will discuss quantum interference phenomena of composite fermions in quantum Hall systems. In particular, I will focus on huge mesoscopic fluctuations of non-linear response and of Coulomb drag in single and bi-layer systems. Finally, I will give a simple physical picture of dephasing (de-coherence) of composite fermions, with simple expressions for their coherence length.

Most of the talk will be based on work done in collaboration with I. Aleiner and B. Narozhny (Stony Brook).