By A. Turbiner and E. Shuryak

It is shown that for one-dimensional anharmonic oscillator with potential *V(x)= a x^2 + b g x^3 +\ldots=\frac{1}{g^2}\,\hat{V}(gx)*, as well as for radial oscillator *V(r)=\frac{1}{g^2}\,\hat{V}(gr)* and for perturbed Coulomb problem *V(r)=\frac{\alpha}{r}+ \beta g r + \ldots = g\,\tilde{V}(gr)*, the Perturbation Theory in powers of coupling constant *g* (weak coupling regime)... Show more

September 19, 2021

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