Abstract
One considers the one-dimensional Dirac operator with a slowly oscillating potential
where
. The following statement holds. The double absolutely continuous spectrum of the operator (1) fills the intervals (−∞,−¦q¦), (¦q¦, ∞). The interval (−¦q¦, ¦q¦) is free from spectrum. The operator has a simple eigenvalue only for singn C+=sign C−, situated either at the point (under the condition C+>0) or at the point λ=−¦q¦ (under the condition). The proof is based on the investigation of the coordinate asytnptotics of the corresponding equation.
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Literature cited
A. R. Its and V. B. Matveev, “Coordinatewise asymptotic behavior of Schrodinger's equation with a rapidly oscillating potential,” Zap. Nauchn. Sem. Leningr. Otd. Mat. Inst.,51, 119–122 (1975).
M. M. Skriganov, “The eigenvalues of the Schrodinger operator, situated on the continuous spectrum,” Zap. Nauchn. Sem. Leningr. Otd. Mat. Inst.,38, 149–152 (1973).
V. B. Matveev, “Wave operators and positive eigenvalues for the Schrodinger equation with an oscillating potential,” Teor. Mat. Fiz.,15, No. 3, 353–367 (1973).
V. B. Matveev and M. M. Skriganov, “The scattering problem for the radial Schrodinger equation with a slowly decreasing potential,” Teor. Mat. Fiz.,10, No. 2, 146–159 (1972).
Additional information
Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 70, pp. 7–10, 1977.
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Bordag, L.A. A gap in the energy spectrum of the one-dimensional Dirac operator. J Math Sci 23, 1875–1877 (1983). https://doi.org/10.1007/BF01093271
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DOI: https://doi.org/10.1007/BF01093271