Exact Results in Quantum Theory
Sala Duża Teoretyczna, ul. Hoża 69
2014-01-24 (14:15) 
prof. Jan Dereziński (KMMF UW)
My observations on how physicists use QED
I will start with a short story, hopefully entertaining.Then I will discuss the general philosophy of precision computations of Lamb shifts using QED, based in particular on the works of Shabaev and Pachucki. I will explain two kinds of effective Hamiltonians. Then I will discuss the formalism of time-ordered and 2-times Green's functions. Finally, if there is still time, I will say about the structure of QED and possible perturbative approaches, which re relevant for te bound state computations.