Vol. 14, No. 7, 2021

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Scattering theory for repulsive Schrödinger operators and applications to the limit circle problem

Kouichi Taira

Vol. 14 (2021), No. 7, 2101–2122

We study existence of the outgoing/incoming resolvents of repulsive Schrödinger operators which may not be essentially self-adjoint on the Schwartz space. As a consequence, we construct L2-eigenfunctions associated with complex eigenvalues by a standard technique of scattering theory. In particular, we give another proof of the classical result via microlocal analysis: the repulsive Schrödinger operators with large repulsive exponent are not essentially self-adjoint on the Schwartz space.

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self-adjointness, microlocal analysis, scattering theory
Mathematical Subject Classification 2010
Primary: 35P25, 81Q10
Received: 15 June 2019
Revised: 30 March 2020
Accepted: 31 July 2020
Published: 10 November 2021
Kouichi Taira
Research Organization of Science and Technology
Ritsumeikan University