| 講演要旨： |
The correct physical treatment of electron-photon interactions is provided by quantum electrodynamics (QED). Its characteristic feature is that both radiation and matter are quantized. A non-relativistic version of the theory, that is most conveniently cast in the Coulomb gauge and termed molecular QED, is ideally suited to dealing with radiation-molecule and molecule-molecule interactions. Successful applications have included, inter alia, single- and multi-photon absorption and emission, intermolecular forces, optical activity, chiroptical phenomena, light scattering, and nonlinear optical processes.
After a brief introduction to the multipolar form of molecular QED, its recent application to the study of retarded intermolecular interactions, will be presented in this talk. These include phenomena such as resonant transfer of energy, the van der Waals dispersion force, and the effect of an external electromagnetic field in modifying the energy shift between a pair of molecules in mutual interaction. Three alternate approaches for generalizing the treatment to account for all electric multipole-multipole couplings will be discussed. The first involves diagrammatic perturbation theory, the second uses Maxwell fields and response theory, while the third is based on the method of induced moments. Advantages and disadvantages of each viewpoint will be highlighted.
|
