By the end of World War I, Albert Einstein had become the face of the new science of theoretical physics and had made some powerful enemies. One of those enemies, Nobel Prize winner Philipp Lenard, spent a career trying to discredit him. Their story of conflict, pitting Germany’s most widely celebrated Jew against the Nazi scientist who was to become Hitler’s chief advisor on physics, had a…
This is a text for an Advanced Quantum Field Theory course that I have been teaching for many years at Instituto Superior T´ecnico, in Lisbon. This course was first written in Portuguese. Then, at a latter stage, I added some text in one-loop techniques in English. Then, I realized that this text could be more useful if it was all in English. The process took some years but the text it is …