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Many-Body Simulation of Two-Dimensional Electronic Spectroscopy of Excitons and Trions in Monolayer Transition-Metal Dichalcogenides
Roel Tempelaar, Timothy C. Berkelbach
We present a many-body formalism for the simulation of time-resolved nonlinear spectroscopy and apply it to study the coherent interaction between excitons and trions in doped tran…
Ab Initio Lifetime and Concomitant Double-Excitation Character of Plasmons at Metallic Densities
Alan M. Lewis, Timothy C. Berkelbach
The accurate calculation of excited state properties of interacting electrons in the condensed phase is an immense challenge in computational physics. Here, we use state-of-the-art…
Vertex corrections to the polarizability do not improve the GW approximation for the ionization potential of molecules
Alan M. Lewis, Timothy C. Berkelbach
The approximation is based on the neglect of vertex corrections, which appear in the exact self-energy and the exact polarizability. Here, we investigate the importance of ver…
On The Relation Between Equation-of-Motion Coupled-Cluster Theory and the GW Approximation
Malte F. Lange, Timothy C. Berkelbach
We discuss the analytic and diagrammatic structure of ionization potential (IP) and electron affinity (EA) equation-of-motion coupled-cluster (EOM-CC) theory, in order to put it on…
Random-phase approximation excitation energies from approximate equation-of-motion ring coupled-cluster doubles
Timothy C. Berkelbach
The ground-state correlation energy calculated in the random-phase approximation (RPA) is known to be identical to that calculated using a subset of terms appearing in coupled-clus…