Convergence Behavior of Variational Perturbation Expansions
classification
🪐 quant-ph
keywords
behaviorconvergenceexpansionsperturbationvariationalallowsanharmonicapproximations
read the original abstract
Variational weak-coupling perturbation theory yields converging approximations, uniformly in the coupling strength. This allows us to calculate directly the coefficients of `strong-coupling' expansions. For the anharmonic oscillator we explain the physical origin of the empirically observed convergence behavior which is exponentially fast with superimposed oscillations.
This paper has not been read by Pith yet.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.