Abstract
We present a method to determine the shot noise in quantum systems from knowledge of their time evolution---the latter being obtained using numerical simulation techniques. While our ultimate goal is the study of interacting systems, the main issues for the numerical determination of the noise do not depend on the interactions. To discuss them, we concentrate on the single resonant level model, which consists in a single impurity attached to noninteracting leads, with spinless fermions. We use exact diagonalizations to obtain time evolution and are able to use known analytic results as benchmarks. We obtain a complete characterization of finite-size effects at zero frequency, where we find that the finite-size corrections scale $\ensuremath{\propto}{G}^{2}$, $G$ the differential conductance. We also discuss finite frequency noise as well as the effects of damping in the leads.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
