Nonperturbative treatment of the SSH model coupled to quantum light

ORAL

Abstract

We investigate how an optical cavity can modify electron-phonon coupling in the non-perturbative regime by developing a fully quantum-mechanical treatment of the structural and electronic properties of the Su-Schrieffer-Heeger model coupled to quantum light. We perform numerical calculations using the exact diagonalization method, and assess the effects of the cavity for both the ground and excited states. We show how including correlation between all the constituents of the system (electrons, nuclei, and photons) gives rise to so called phonoritons, and we compare our treatment to an approach based on the Peierls substitution method. Our results highlight some important factors to consider when treating light-matter interactions in the non-perturbative regime.

*This work was supported by the Cluster of Excellence "CUI Advanced Imaging of Matter"- EXC 2056 - Project ID 390715994 and SFB-925 "Light induced dynamics and control of correlated quantum systems" - Project 170620586 of the Deutsche Forschungsgemeinschaft (DFG), and by the project Grupos Consolidados of the Basque University System (IT1249-19).

–

Presenters

  • Anatoly Obzhirov

    • Max Planck Institute for Structure and Dynamics of Matter

Authors

  • Anatoly Obzhirov

    • Max Planck Institute for Structure and Dynamics of Matter

  • Aaron Kelly

    • 1. Max Planck Institute for Structure and Dynamics of Matter 2. Department of Chemistry, Dalhousie University 3. Hamburg Center for Ultrafast Imaging, University of Hamburg

  • Angel Rubio

    • Max Planck Institute for Structure and Dynamics of Matter
    • Max Planck Institute for the Structure &
    • Max Planck Institute for the Structure & Dynamics of Matter
    • Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany
    • Max Planck Institute for the Structure &Dynamics of Matter; Center for Computational Quantum Physics (CCQ), Flatiron Institute
    • 1. Max Planck Institute for the Structure and Dynamics of Matter 2. Center for Computational Quantum Physics (CCQ), Flatiron Institute, 162 Fifth Avenue, New York NY