89 citations · 416 across the 15 of their papers we have counts for
15 papers
Many-body Green's function theory of electrons and nuclei beyond the Born-Oppenheimer approximation
Ville J. Härkönen, Robert van Leeuwen, E. K. U. Gross
The method of many-body Green's functions is developed for arbitrary systems of electrons and nuclei starting from the full (beyond Born-Oppenheimer) Hamiltonian of Coulomb interac…
Distinguishing Majorana Zero Modes from Impurity States through Time-Resolved Transport
Riku Tuovinen, Enrico Perfetto, Robert van Leeuwen +2
We study time-resolved charge transport in a superconducting nanowire using time-dependent Landauer-B{ü}ttiker theory. We find that the steady-state Majorana zero-bias conductance…
Strictly correlated electrons approach to excitation energies of dissociating molecules
Luis Cort, Soeren Ersbak Bang Nielsen, Robert van Leeuwen
In this work we consider a numerically solvable model of a two-electron diatomic molecule to study a recently proposed approximation based on the density-functional theory of so-ca…
The Generalized Kadanoff-Baym Ansatz with Initial Correlations
Daniel Karlsson, Robert van Leeuwen, Enrico Perfetto +1
Within the non-equilibrium Green's function (NEGF) formalism, the Generalized Kadanoff-Baym Ansatz (GKBA) has stood out as a computationally cheap method to investigate the dynamic…
Phononic heat transport in the transient regime: An analytic solution
Riku Tuovinen, Niko Säkkinen, Daniel Karlsson +2
We investigate the time-resolved quantum transport properties of phonons in arbitrary harmonic systems connected to phonon baths at different temperatures. We obtain a closed analy…
Diagrammatic expansion for positive density-response spectra: Application to the electron gas
A. -M. Uimonen, G. Stefanucci, Y. Pavlyukh +1
In a recent paper [Phys. Rev. B 90, 115134 (2014)] we put forward a diagrammatic expansion for the self-energy which guarantees the positivity of the spectral function. In this wor…