Séminaire Q. Charles Su

The computational quantum field theory developed by Dr. Su’s research team provides an effective means for studying the vacuum breakdown by ultra-strong fields and the generation of electron-positron pairs with spatial and temporal resolution. With the help of this computational tool, we were able to comment on the Klein paradox. More recently, we have focused on how to effectively lower the field threshold to trigger pair creation by designing external field configurations with optimal variations in space or in time. We have extended our model to investigate the origin of the Coulomb force where electron-proton interactions are facilitated not through an external background field but through the exchange of mediating photons. The present talk discusses some results obtained by solving the Dirac equation from the perspectives of classical mechanics, quantum field theory, and quantum electrodynamics. .