title: Current noise in three-terminal hybrid quantum point contacts.
abstract: We investigate the current noise of three-terminal hybrid structures at arbitrary bias voltages. Our results indicate that the noise can be a useful tool to extract dynamical information in multi-terminal hybrid structures. The zero-frequency noise is sensitive to the coupling with a normal lead. As a result, the characteristic multiple-step structure of the noise Fano factor due to multiple Andreev reflection will be suppressed as we increase this coupling. In addition, the internal dynamics due to processes of Andreev reflection and multiple Andreev reflection raises rich features in the noise spectrum corresponding to the energy differences of various dynamical processes.
authors.affiliation: Department of Applied Physics, Donghua University, 2999 North Renmin Road, Shanghai 201620, People's Republic of China.
authors.forename: B H
authors.initials: BH
authors.lastname: Wu
authors.forename: C R
authors.initials: CR
authors.lastname: Wang
authors.forename: X S
authors.initials: XS
authors.lastname: Chen
authors.forename: G J
authors.initials: GJ
authors.lastname: Xu