Light-matter interactions via the exact factorization approach

Norah M. Hoffmann, Heiko Appel, Angel Rubio, Neepa T. Maitra

Research output: Contribution to journalArticlepeer-review


The exact factorization approach, originally developed for electron-nuclear dynamics, is extended to light-matter interactions within the dipole approximation. This allows for a Schrödinger equation for the photonic wavefunction, in which the potential contains exactly the effects on the photon field of its coupling to matter. We illustrate the formalism and potential for a two-level system representing the matter, coupled to an infinite number of photon modes in the Wigner-Weisskopf approximation, as well as to a single mode with various coupling strengths. Significant differences are found with the potential used in conventional approaches, especially for strong couplings. We discuss how our exact factorization approach for light-matter interactions can be used as a guideline to develop semiclassical trajectory methods for efficient simulations of light-matter dynamics.

Original languageEnglish (US)
Article number180
JournalEuropean Physical Journal B
Issue number8
StatePublished - Aug 1 2018

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


Dive into the research topics of 'Light-matter interactions via the exact factorization approach'. Together they form a unique fingerprint.

Cite this