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

Certain spin Hamiltonians that give rise to tunnel splittings that are viewedin terms of interfering instanton trajectories, are restudied using a discreteWKB method, that is more elementary, and also yields wavefunctions andpreexponential factors for the splittings. A novel turning point inside theclassically forbidden region is analysed, and a general formula is obtained forthe splittings. The result is appled to the \Fe8 system. A previous result forthe oscillation of the ground state splitting with external magnetic field isextended to higher levels.Comment: RevTex, one ps figur

Oscillatory Tunnel Splittings in Spin Systems: A Discrete Wentzel-Kramers-Brillouin Approach