2010/11/30 by Michael Ruggenthaler, M. Ruggenthaler, Felix Mackenroth +2 · 1 citation
Physics and Astronomy · #Advanced Chemical Physics Studies #Cold Atom Physics and Bose-Einstein Condensates #Quantum and electron transport phenomena #cond-mat.other #quant-ph
paper · pdf · doi:10.1103/physreva.84.042107
published as Phys. Rev. A 84, 042107 (2011) · 8 pages
openalex publication_date 2011/10/07 · arxiv created 2011/10/10 · arxiv updated 2011/10/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We prove a generalization of the van Leeuwen theorem toward quantum electrodynamics, providing the formal foundations of a time-dependent Kohn-Sham construction for coupled quantized matter and electromagnetic fields. We circumvent the symmetry-causality problems associated with the action-functional approach to Kohn-Sham systems. We show that the effective external four-potential and four-current of the Kohn-Sham system are uniquely defined and that the effective four-current takes a very simple form. Further we rederive the Runge-Gross theorem for quantum electrodynamics.