Cambridge University Press) Available for the first time in paperback, The Quantum Theory of Fields is a self-contained, comprehensive, and up-to-date introduction to quantum field theory from Nobel… Expand

A interacting theory that violates CPT invariance necessarily violates Lorentz invariance. On the other hand, CPT invariance is not sufficient for out-of-cone Lorentz invariance. Theories that… Expand

SummaryThe idea of using clothed operators in the quantum theory of fields, i.e. operators which create and annihilate one particle eigenstates of the total Hamiltonian, is examined. In cut-off… Expand

Abstract Generalized free fields are a generalization of the free field in which the commutator is a c -number but does not satisfy a homogeneous Klein-Gordon equation. Some properties of generalized… Expand

Generalized Bose operators b which reduce by two the number of quanta of a Bose operator a are studied in the Fock space of a. All representations of the b's as normal‐ordered (infinite degree) power… Expand