Tuning decoherence with a voltage probe (2009)
Roulleau, P., Portier, F., Roche, P., Cavanna, A., Faini, G., Gennser, U., ...
We present an experiment where we tune the decoherence in a quantum interferometer using one of the simplest object available in the physic of quantum conductors : an ohmic contact. For that purpose,...
Noise dephasing in the edge states of the Integer Quantum Hall regime (2008)
Roulleau, P., Portier, F., Roche, P., Cavanna, A., Faini, G., Gennser, U., ...
An electronic Mach Zehnder interferometer is used in the integer quantum hall regime at filling factor 2, to study the dephasing of the interferences. This is found to be induced by the electrical...
Direct measurement of the coherence length of edge states in the Integer Quantum Hall Regime (2007)
Roulleau, P., Portier, F., Roche, P., Cavanna, A., Faini, G., Gennser, U., ...
We have determined the finite temperature coherence length of edge states in the Integer Quantum Hall Effect (IQHE) regime. This was realized by measuring the visibility of electronic Mach-Zehnder...