Application of the discrete Wentzel–Kramers–Brillouin method to spin tunneling | Zendy

Anupam Garg | Zendy

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Application of the discrete Wentzel–Kramers–Brillouin method to spin tunneling

Author(s) -

Anupam Garg

Publication year - 1998

Publication title -

journal of mathematical physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.708

H-Index - 119

eISSN - 1089-7658

pISSN - 0022-2488

DOI - 10.1063/1.532563

Subject(s) - wkb approximation , instanton , degenerate energy levels , brillouin zone , quantum tunnelling , quantum mechanics , physics , spin (aerodynamics) , mathematical physics , mathematics , thermodynamics

A discrete version of the WKB method is developed and applied to calculatethe tunnel splittings between classically degenerate states of spinHamiltonians. The results for particular model problems are in complete accordwith those previously found using instanton methods. The discrete WKB method ismore elementary and also yields wavefunctions.Comment: RevTex, 2ps figures, incorporates errata (typos and omitted reference) in JMP pape

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