CHEERS: a tool for correlated hole-electron evolution from real-time simulations. (25th October 2018)

• Record Type: Journal Article
• Authors: Perfetto, E; Stefanucci, G
• Is Part Of: Journal of physics. Volume 30:Number 46(2018)
• Publication Date: 2018-10-25
• Subjects: ultrafast phenomena -- nonequilibrium Green's functions -- charge migration -- transient spectroscopy -- quantum transport -- correlations effects; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aae675
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We put forward a practical nonequilibrium Green's function (NEGF) scheme to perform real-time evolutions of many-body interacting systems driven out of equilibrium by external fields. CHEERS is a computational tool to solve the NEGF equation of motion in the so called generalized Kadanoff–Baym ansatz and it can be used for model systems as well as first-principles Hamiltonians. Dynamical correlation (or memory) effects are added to the Hartree–Fock dynamics through a many-body self-energy. Applications to time-dependent quantum transport, time-resolved photoabsorption and other ultrafast phenomena are discussed.