20 citations · 51 across the 3 of their papers we have counts for
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Current-constraining variational approaches to quantum transport
P. Bokes, H. Mera, R. W. Godby
Presently, the main methods for describing a non-equilibrium charge-transporting steady state are based on time-evolving it from the initial zero-current situation. An alternative…
Conductance and polarization in quantum junctions
P. Bokes, R. W. Godby
We revisit the expression for the conductance of a general nanostructure -- such as a quantum point contact -- as obtained from the linear response theory. We show that the conduct…
Diagrammatic self-energy approximations and the total particle number
Arno Schindlmayr, P. Garcia-Gonzalez, R. W. Godby
There is increasing interest in many-body perturbation theory as a practical tool for the calculation of ground-state properties. As a consequence, unambiguous sum rules such as th…
Spectra and total energies from self-consistent many-body perturbation theory
Arno Schindlmayr, Thomas J. Pollehn, R. W. Godby
With the aim of identifying universal trends, we compare fully self-consistent electronic spectra and total energies obtained from the GW approximation with those from an extended…
Assessment of the GW approximation using Hubbard chains
Thomas J. Pollehn, Arno Schindlmayr, R. W. Godby
We investigate the performance of the GW approximation by comparison to exact results for small model systems. The role of the chemical potentials in Dyson's equation as well as th…
Systematic vertex corrections through iterative solution of Hedin's equations beyond the GW approximation
Arno Schindlmayr, R. W. Godby
We present a general procedure for obtaining progressively more accurate functional expressions for the electron self-energy by iterative solution of Hedin's coupled equations. The…