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

The group theoretical treatment of bound and scattering state problems isextended to include band structure. We show that one can realize Hamiltonianswith periodic potentials as dynamical symmetries, where representation theoryprovides analytic solutions, or which can be treated with more general spectrumgenerating algebraic methods. We find dynamical symmetries for which we derivethe transfer matrices and dispersion relations. Both compact and non-compactgroups are found to play a role.Comment: 4 pages + 2 figs. Revtex/epsf. To appear: Phys Rev Lett, v.83 199

Group Theory Approach to Band Structure: Scarf and Lamé Hamiltonians