Time-Dependent Density Functional Theory for Many-Electron Systems Interacting with Cavity Photons
- 4 June 2013
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 110 (23), 233001
- https://doi.org/10.1103/physrevlett.110.233001
Abstract
Time-dependent (current) density functional theory for many-electron systems strongly coupled to quantized electromagnetic modes of a microcavity is proposed. It is shown that the electron-photon wave function is a unique functional of the electronic (current) density and the expectation values of photonic coordinates. The Kohn-Sham system is constructed, which allows us to calculate the above basic variables by solving self-consistent equations for noninteracting particles. We suggest possible approximations for the exchange-correlation potentials and discuss implications of this approach for the theory of open quantum systems. In particular we show that it naturally leads to time-dependent density functional theory for systems coupled to the Caldeira-Leggett bath.Keywords
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