In Peskin- Schroeder, pag 412: "In massless phi4 theory, the one-loop propagator correction is completely canceled by mass counterterm."
So, do massless theory provides mass counterterm? How is it generated? Maybe from a bare mass...don't have any clue. I'm confused because it seems that...
Can anyone help me...from Nielsen-Chuang "quantum computation and quantum information":how might we recognize that a process in nature computes a function not computable by a turing machine?
Hi, i have just started studying quantum computing. i found it very interesting and i was wondering to dedicate my thesis on it...BUT...i suffer a lack of knowledge about classical computing devices (i'm not talking about the classic works on logic by Turing and Church and so forth)...so..can...