English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The spectral problem for O(D) symmetric polynomial potentials allows for apartial algebraic solution after analytical continuation to negative evendimensions D. This fact is closely related to the disappearance of thefactorial growth of large orders of the perturbation theory at negative even D.As a consequence, certain quantities constructed from the perturbativecoefficients exhibit fast inverse factorial convergence to the asymptoticvalues in the limit of large orders. This quantum mechanical construction canbe generalized to the case of quantum field theory.

Anharmonic oscillator, negative dimensions and inverse factorial convergence of large orders to the asymptotic form