EntityQ3957888· pop 8· linked from 28 articlesDyson seriesSign in to saveperturbative expansion of the time evolution operator in the interaction pictureConnectionspath-orderingEntityInternational Standard Book NumberEntitydataEntitydigital object identifierEntityFreeman DysonEntitymathematical physicsEntitybibcodeEntityquantum electrodynamicsEntityscatteringEntityfine-structure constantEntityHamiltonian operatorEntityFeynman diagramEntityperturbation theoryEntityinteraction pictureEntitySchrödinger pictureEntityHeisenberg pictureEntityasymptotic expansionEntityS-matrixEntityfixed-point iterationEntityNeumann seriesEntityCategoriesFreeman DysonQuantum field theoryScattering theory