Dresden 2014 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 24: Focussed Session: Frontiers of Electronic Structure Theory - Non-equilibrium Phenomena at the Nano-scale III (O with HL/TT/MM)
MM 24.3: Vortrag
Dienstag, 1. April 2014, 11:15–11:30, TRE Ma
Real-time propagation of coupled Maxwell-Schrödinger and time-dependent Kohn-Sham-Maxwell systems — •René Jestädt1, Heiko Appel1, and Angel Rubio1,2 — 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany — 2NanoBio Spectroscopy group and ETSF, Universidad del País Vasco, San Sebastián, Spain
Based on the Riemann-Silberstein vector of the electromagnetic field, we
formulate Maxwell’s equations in a symplectic spinor representation similar
to the Dirac equation.
This spinor representation allows us to use standard unitary propagation
techniques developed for the Schrödinger equation [1] also for Maxwell’s
equations and simplifies a coupled solution of Maxwell’s and Schrödinger’s
equations. To illustrate our approach, we present the real-time evolution
of atomic systems embedded in optical waveguides and dielectric nanostructures.
The coupling of Maxwell’s
equations to the time-dependent Kohn-Sham equations is
a basic ingredient for the development of a time-dependent density functional
theory formulation of quantum electrodynamics [2]. As an extension of our work
on coupled Maxwell-Schrödinger systems, we show first steps of an implementation
of Maxwell’s equations coupled to the time-dependent Kohn-Sham equations in
the first principles real-space real-time code octopus [3].
[1] A. Castro et al., J. Chem. Phys. 121 (2004).
[2] M. Ruggenthaler, F. Mackenroth, and D. Bauer, Phys. Rev. A 84, 042107 (2011); I. Tolkatly, Phys. Rev. Lett. 110, 233001 (2013).
[3] X. Andrade et al., J. Phys. Cond. Mat. 24 (2012).