title: Analytical continuation approaches to electronic transport: the resonant level model.
abstract: The analytical continuation average spectrum method (ASM) and maximum entropy (MaxEnt) method are applied to the dynamic response of a noninteracting resonant level model within the framework of the Kubo formula for electric conductivity. The frequency dependent conductivity is inferred from the imaginary time current-current correlation function for a wide range of temperatures, gate voltages, and spectral densities representing the leads, and compared with exact results. We find that the MaxEnt provides more accurate results compared to the ASM over the full spectral range.
authors.affiliation: School of Physics and Astronomy, The Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel.
authors.forename: Eli Y
authors.initials: EY
authors.lastname: Wilner
authors.forename: Tal J
authors.initials: TJ
authors.lastname: Levy
authors.forename: Eran
authors.initials: E
authors.lastname: Rabani