Shell interactions for Dirac operators |
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Authors: | Naiara Arrizabalaga Albert Mas Luis Vega |
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Institution: | Departamento de Matemáticas, Universidad del País Vasco, 48080 Bilbao, Spain |
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Abstract: | The self-adjointness of H+V is studied, where H=−iα⋅∇+mβ is the free Dirac operator in R3 and V is a measure-valued potential. The potentials V under consideration are given by singular measures with respect to the Lebesgue measure, with special attention to surface measures of bounded regular domains. The existence of non-trivial eigenfunctions with zero eigenvalue naturally appears in our approach, which is based on well known estimates for the trace operator defined on classical Sobolev spaces and some algebraic identities of the Cauchy operator associated to H. |
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Keywords: | primary 81Q10 secondary 35Q40 |
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