Time-dependent Kohn-Sham approach to quantum electrodynamics
Journal Article
·
· Physical Review. A
- Institut fuer Physik, Universitaet Rostock, DE-18051 Rostock (Germany)
- Max-Planck-Institut fuer Kernphysik, Postfach 103980, DE-69029 Heidelberg (Germany)
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.
- OSTI ID:
- 22080323
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 84; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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