Scharf pioneered the application of causal perturbation theory to the rigorous construction of perturbative quantum field theories:
In his book
he discusses quantum electrodynamics this way, and in
he discusses Yang-Mills theory, hence electroweak theory and quantum chromodynamics as well as perturbative quantum gravity.
On vacua/ground states of the free Dirac field in a Coulomb background field:
Last revised on May 9, 2022 at 06:10:20. See the history of this page for a list of all contributions to it.