D.S. Guo, Ph. D.
- We are trying to develop a systematic quantum
electrodynamics theory which treat interactions between atoms
and intense photon fields, nonperturbatively. By employing this
method we study the following multiphoton effects: the energy shifts
of atomic bound states in strong radiation fields, multiphoton
Compton scattering, strong field Kapitza-Dirac effect, multip
ionization in multimode cases, and Lamb shifts. The main
methods which we are using are solution technique and
nonperturbative formal scattering-theory. The wave functions
and energy levels obtained from this theory can be directly applied
to many physical phenomena.
- Using the same technique, we are trying to develop a
non-perturbative approach to electron-phonon interactions, by
which, we are going to treat a number of phenomena in solid states,
such as mobility of electrons, energy gaps, superconductivity and high
temperature superconductivity.
- Optical methods are important means in research of material
science. Especially Raman scattering, which is extremely important in
the studies of molecular structures of many kinds of materials. A
lot of phenomena are untouched theoretically and experimentally
in this a From many-electron atomic theory, to predict in theory
and to observe in experiment of Raman scattering is
possible. By studying this new type of Raman scattering, we will
reveal new properties of materials.