An illustration of the light-front coupled-cluster method in quantum electrodynamics
arXiv:1208.6080 · doi:10.1063/1.4763516
Abstract
A field-theoretic formulation of the exponential-operator technique is applied to a nonperturbative Hamiltonian eigenvalue problem in electrodynamics, quantized in light-front coordinates. Specifically, we consider the dressed-electron state, without positron contributions but with an unlimited number of photons, and compute its anomalous magnetic moment. A simple perturbative solution immediately yields the Schwinger result of α/2π. The nonperturbative solution, which requires numerical techniques, sums a subset of corrections to all orders in α and incorporates additional physics.
6 pages, 1 figure; RevTeX 4.1; presented at QCD@Work2012, the International Workshop on QCD Theory and Experiment, June 18-21, 2012, Lecce, Italy