title: Experimental test of the high-frequency quantum shot noise theory in a quantum point contact.
abstract: We report on direct measurements of the electronic shot noise of a quantum point contact at frequencies nu in the range 4-8 GHz. The very small energy scale used ensures energy independent transmissions of the few transmitted electronic modes and their accurate knowledge. Both the thermal energy and the quantum point contact drain-source voltage V_{ds} are comparable to the photon energy hnu leading to observation of the shot noise suppression when V_{ds}<hnu/e. Our measurements provide the first complete test of the finite frequency shot noise scattering theory without adjustable parameters.
authors.affiliation: Nanoelectronic Group, Service de Physique de l'Etat Condensé, CEA Saclay, F-91191 Gif-Sur-Yvette, France.
authors.forename: E
authors.initials: E
authors.lastname: Zakka-Bajjani
authors.forename: J
authors.initials: J
authors.lastname: Ségala
authors.forename: F
authors.initials: F
authors.lastname: Portier
authors.forename: P
authors.initials: P
authors.lastname: Roche
authors.forename: D C
authors.initials: DC
authors.lastname: Glattli
authors.forename: A
authors.initials: A
authors.lastname: Cavanna
authors.forename: Y
authors.initials: Y
authors.lastname: Jin