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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A method is presented which permits computation of the spectra of hamiltonians with special potentials. This method uses path integrals for the evaluation of Feynman-propagators and is a generalization of Evseev's method. It is shown that, depending on the form of the potential, expansions of series occur which can be summed up according to criteria of convergency for divergent series, i. e. Cesàro- or Euler-summability. Consequently interchanging of summation and integration is not allowed for all regions of the complex time plane. This is shown explicitly for the 6-dimensional harmonic oscillator.

zeitschrift für naturforschung a

Zur Konvergenz der numerischen Berechnung von Energieeigenwerten mit Hilfe der Wegintegralmethode / On the Convergency oj the Numerical Calculations of Eigenvalues with the Method oj Path Integrals