1
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Derivation of the stationary fluorescence spectrum formula for molecular systems from the perspective of quantum electrodynamics

      , ,

      Lithuanian Journal of Physics

      Lithuanian Academy of Sciences

      Read this article at

      ScienceOpenPublisher
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Numerical simulations of stationary fluorescence spectra of molecular systems usually rely on the relation between the photon emission rate and the system’s dipole–dipole correlation function. However, research papers usually take this relation for granted, and standard textbook expositions of the theory of fluorescence spectra also tend to leave out this important relation. In order to help researchers with less theoretical training gain a deeper understanding of the emission process, we perform a step-by-step derivation of the expression for the fluorescence spectrum, focusing on rigorous mathematical treatment and the underlying physical content. Right from the start, we employ quantum description of the electromagnetic field, which provides a clear picture of emission that goes beyond the phenomenological treatment in terms of the Einstein A coefficient. Having obtained the final expression, we discuss the relation of the latter to the present level of theory by studying a simple two-level system. From the technical perspective, the present work also aims at familiarizing the reader with the density matrix formalism and with the application of the double-sided Feynman diagrams.

          Related collections

          Most cited references26

          • Record: found
          • Abstract: not found
          • Book: not found

          Principles of Fluorescence Spectroscopy

            Bookmark
            • Record: found
            • Abstract: not found
            • Book: not found

            Charge and Energy Transfer Dynamics in Molecular Systems

              Bookmark
              • Record: found
              • Abstract: not found
              • Book: not found

              Two-Dimensional Optical Spectroscopy

                Bookmark

                Author and article information

                Journal
                Lithuanian Journal of Physics
                physics
                Lithuanian Academy of Sciences
                2424-3647
                1648-8504
                June 30 2021
                June 30 2021
                : 61
                : 2
                Article
                10.3952/physics.v61i2.4440
                002f18df-3a2b-42ef-acaf-ffab7fdde157
                © 2021

                Comments

                Comment on this article