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Quantum Interference with edge states in the Integer Quantum Hall Regime

Christoph Strunk Institute for Experimental and Applied Physics, University of Regensburg –Germany

We study an electronic Mach-Zehnder Interferometer (MZI) employing the edge channels of a two-dimensional electron gas in the quantum Hall regime and quantum point contacts as tunable beam splitters.

Three energy scales extracted from the temperature and voltage dependence of the visibility change in a very similar way with the filling factor, indicating that the different aspects of the interference are controlled by a single magnetic field dependent energy scale.