Photon Many-Body Dispersion: Exchange-Correlation Functional for Strongly Coupled Light-Matter Systems

Author(s): Cankut Tasci, Leonardo A. Cunha, and Johannes Flick We introduce an electron-photon exchange-correlation functional for quantum electrodynamical density-functional theory (QEDFT). The approach, photon MBD (pMBD), is inspired by the many-body dispersion (MBD) method for weak intermolecular interactions, which is generalized to include both electronic … [Phys. Rev. Lett. 134, 073002] Published Fri Feb 21, 2025