Ph.D., 1966 - Harvard University
Louisiana State University
Department of Physics & Astronomy
337 Nicholson Hall, Tower Dr.
Baton Rouge, LA 70803-4001
My research interest is in quantum field theory and particle physics. I have formulated a background field functional integral method to calculate directly the effective Lagrangian in perturbation theory, bypassing more conventional calculation of numerous individual amplitudes using Feynman diagrams.
Recently I have proposed that this method can be used to replace the unnatural regularization procedure in quantum field theory to render calculations gauge invariant and free of hard divergence by incorporating boundary dynamics complementary to the Lagrangian dynamics. New results have been obtained on anomalous contributions in QED: the 1+1 dimensional Schwinger model, the 2+1 dimensional Chern-Simons term and the 3+1 dimensional induced Chern-Simons term from a Lorentz and CPT violating term in the fermion QED Lagrangian.
I have also developed a generalized derivative expansion series method to express nonlocal quantum corrections of quantum field theories in the presence of classical background field as an infinite series of local expressions. The method has been applied to calculate Casimir energies of classical configurations in various quantum field theory models. The infinite series can be continued analytically either to recover known analytical solutions or to provide numerical solutions far more superior to conventional phase shift method.
New applications of this novel effective Lagrangian approach are continuously explored.