89 citations · 165 across the 3 of their papers we have counts for
3 papers
Violation of the `Zero-Force Theorem' in the time-dependent Krieger-Li-Iafrate approximation
Michael Mundt, Stephan Kümmel, Robert van Leeuwen +1
We demonstrate that the time-dependent Krieger-Li-Iafrate approximation in combination with the exchange-only functional violates the `Zero-Force Theorem'. By analyzing the time-de…
Conserving Approximations in Time-Dependent Density Functional Theory
Ulf von Barth, Nils Erik Dahlen, Robert van Leeuwen +1
In the present work we propose a theory for obtaining successively better approximations to the linear response functions of time-dependent density or current-density functional th…
Introduction to the Keldysh formalism and applications to time-dependent density-functional theory
Robert van Leeuwen, Nils Erik Dahlen, Gianluca Stefanucci +2
This paper gives an introduction to the Keldysh formalism, with emphasis on its usefulness in time-dependent density functional theory. In the first part we introduce the Keldysh c…