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Variational principles for eigenvalues of the Klein-Gordon equation

Journal Article · · Journal of Mathematical Physics
DOI:https://doi.org/10.1063/1.2345108· OSTI ID:20861061
;  [1]
  1. Department of Mathematics, University of Strathclyde, 26 Richmond Street, Glasgow G1 1XH (United Kingdom)
In this paper variational principles for eigenvalues of an abstract model of the Klein-Gordon equation with electromagnetic potential are established. They are used to characterize and estimate eigenvalues in cases where the essential spectrum has a gap around 0, even in the presence of complex eigenvalues. As a consequence, a comparison between eigenvalues of the Klein-Gordon equation in R{sup d} and eigenvalues of certain Schroedinger operators is obtained. The results are illustrated on examples including the Klein-Gordon equation with Coulomb and square-well potential.
OSTI ID:
20861061
Journal Information:
Journal of Mathematical Physics, Journal Name: Journal of Mathematical Physics Journal Issue: 10 Vol. 47; ISSN JMAPAQ; ISSN 0022-2488
Country of Publication:
United States
Language:
English

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