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/

Zendy Plus

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

Zendy Tools

Zendy Open

On the basis of a classical‐limit approximation for the Green's function, a classical quantum condition for general, nonseparable dynamical systems is obtained. Bound‐state eigenvalues are seen to be associated with stable periodic trajectories, and quasibound (or metastable) states are related to unstable periodic trajectories. Application is made to ns2 states of the two‐electron atom, and quite resaonable results are obtained for the energies of the 1s2 and 2s2 states of He and H−. An accurate value is also obtained for the lowest eigenvalue of three identical bosons (e.g., helium atoms) interacting through pair Morse potentials.

Classical-Limit Green's Function (Fixed-Energy Propagator) and Classical Quantization of Nonseparable Systems