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Stability of the two-dimensional Brown–Ravenhall operator

Published online by Cambridge University Press:  12 July 2007

A. Bouzouina
Affiliation:
Département de Mathématiques, UMR 6056, Faculté des Sciences de Reims, Moulin de la Housse BP 1039, F-51687 Reims Cedex 2, France ([email protected])

Abstract

We prove that the two-dimensional Brown–Ravenhall operator is bounded from below when the coupling constant is below a specified critical value—a property also referred to as stability. As a consequence, the operator is then self-adjoint. The proof is based on the strategy followed by Evans et al. and Lieb and Yau, with some relevant changes characteristic of the dimension. Our analysis also yields a sharp Kato inequality.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 2002

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