Resummation of QED perturbation series by sequence transformations and the prediction of perturbative coefficients |
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Authors: | Jentschura Becher Weniger Soff |
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Affiliation: | Institut fur Theoretische Physik, TU Dresden, D-01062 Dresden, Germany. |
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Abstract: | We propose a method for the resummation of divergent perturbative expansions in quantum electrodynamics and related field theories. The method is based on a nonlinear sequence transformation and uses as input data only the numerical values of a finite number of perturbative coefficients. The results obtained in this way are for alternating series superior to those obtained using Pade approximants. The nonlinear sequence transformation fulfills an accuracy-through-order relation and can be used to predict perturbative coefficients. In many cases, these predictions are closer to available analytic results than predictions obtained using the Pade method. |
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