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

Extending the idea formulated in Makino {\it{et al}}[Phys.Rev.E{\bf{67}},066205], that is based on the Berry--Robnik approach [M.V. Berry andM. Robnik, J. Phys. A {\bf{17}}, 2413], we investigate the statisticalproperties of a two-point spectral correlation for a classically integrablequantum system. The eigenenergy sequence of this system is regarded as asuperposition of infinitely many independent components in the semiclassicallimit. We derive the level number variance (LNV) in the limit of infinitelymany components and discuss its deviations from Poisson statistics. The slopeof the limiting LNV is found to be larger than that of Poisson statistics whenthe individual components have a certain accumulation. This property agreeswith the result from the semiclassical periodic-orbit theory that is applied toa system with degenerate torus actions[D. Biswas, M.Azam,and S.V.Lawande, Phys.Rev. A {\bf 43}, 5694].

Statistical properties of spectral fluctuations for a quantum system with infinitely many components