34 citations · 52 across the 4 of their papers we have counts for
4 papers
A unified formal approach to weak and strong coupling expansions
Benoit Bellet
The main issue of this work consists in extracting one or several finite values for the sum of series involved in perturbation theories. It is supposed to work for all cases in whi…
Convergent sequences of perturbative approximations for the anharmonic oscillator II. Compact time approach
B. Bellet, P. Garcia, A. Neveu
We present an alternative pathway in the application of the variation improvement of ordinary perturbation theory exposed in [1] which can preserve the internal symmetries of a mod…
Convergent sequences of perturbative approximations for the anharmonic oscillator I. Harmonic approach
B. Bellet, P. Garcia, and A. Neveu
We present numerical evidence that a simple variational improvement of the ordinary perturbation theory of the quantum anharmonic oscillator can give a convergent sequence of appro…
Variational solution of the Gross-Neveu model at finite temperature in the large N limit
Benoit Bellet, Philippe Garcia, Frederic Geniet +1
We use a nonperturbative variational method to investigate the phase transition of the Gross-Neveu model. It is shown that the variational procedure can be generalized to the finit…