title: Real-time decoherence of Landau and Levitov quasiparticles in quantum Hall edge channels.
abstract: Quantum Hall edge channels at integer filling factor provide a unique test bench to understand the decoherence and relaxation of single-electron excitations in a ballistic quantum conductor. In this Letter, we obtain a full visualization of the decoherence scenario of energy (Landau)- and time (Levitov)-resolved single-electron excitations at filling factor ν = 2. We show that the Landau excitation exhibits a fast relaxation followed by spin-charge separation whereas the Levitov excitation only experiences spin-charge separation. We finally suggest to use Hong-Ou-Mandel-type experiments to probe specific signatures of these different scenarios.
authors.affiliation: Université de Lyon, Fédération de Physique A.-M. Ampère, CNRS, Laboratoire de Physique de l'Ecole Normale Supérieure de Lyon, 46 Allée d'Italie, 69364 Lyon Cedex 07, France and Aix Marseille Université, CNRS, CPT, UMR 7332, 13288 Marseille, France and Université de Toulon, CNRS, CPT, UMR 7332, 83957 La Garde, France.
authors.forename: D
authors.initials: D
authors.lastname: Ferraro
authors.affiliation: Université de Lyon, Fédération de Physique A.-M. Ampère, CNRS, Laboratoire de Physique de l'Ecole Normale Supérieure de Lyon, 46 Allée d'Italie, 69364 Lyon Cedex 07, France.
authors.forename: B
authors.initials: B
authors.lastname: Roussel
authors.affiliation: Université de Lyon, Fédération de Physique A.-M. Ampère, CNRS, Laboratoire de Physique de l'Ecole Normale Supérieure de Lyon, 46 Allée d'Italie, 69364 Lyon Cedex 07, France.
authors.forename: C
authors.initials: C
authors.lastname: Cabart
authors.affiliation: Université de Lyon, Fédération de Physique A.-M. Ampère, CNRS, Laboratoire de Physique de l'Ecole Normale Supérieure de Lyon, 46 Allée d'Italie, 69364 Lyon Cedex 07, France.
authors.forename: E
authors.initials: E
authors.lastname: Thibierge
authors.affiliation: Laboratoire Pierre Aigrain, Ecole Normale Supérieure, CNRS, Université Pierre et Marie Curie, Université Paris Diderot, 24 Rue Lhomond, 75231 Paris Cedex 05, France.
authors.forename: G
authors.initials: G
authors.lastname: Fève
authors.affiliation: Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland.
authors.forename: Ch
authors.initials: Ch
authors.lastname: Grenier
authors.affiliation: Université de Lyon, Fédération de Physique A.-M. Ampère, CNRS, Laboratoire de Physique de l'Ecole Normale Supérieure de Lyon, 46 Allée d'Italie, 69364 Lyon Cedex 07, France.
authors.forename: P
authors.initials: P
authors.lastname: Degiovanni