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- W4224016061 abstract "In this paper we examine the semiclassical behavior of the scattering data of a non-self-adjoint Dirac operator with a rapidly oscillating potential that is complex analytic in some neighborhood of the real line. Some of our results are rigorous and quite general. On the other hand, complete and concrete understanding requires the investigation of the WKB geometry of specific examples. For such detailed computations we use a particular example that has been investigated numerically more than 20 years ago by Bronski and Miller and rely heavily on their numerical computations. Mostly employing the exact WKB method, we provide the complete rigorous uniform semiclassical analysis of the Bohr-Sommerfeld condition for the location of the eigenvalues across unions of analytic arcs as well as the associated norming constants. For the reflection coefficient as well as the eigenvalues near 0 in the spectral plane, we employ instead an older theory that has been developed in great detail by Olver. Our analysis is motivated by the need to understand the semiclassical behaviour of the focusing cubic NLS equation with initial data $Aexp{iS/epsilon}$, in view of the well-known fact discovered by Zakharov and Shabat that the spectral analysis of the Dirac operator enables the solution of the NLS equation via inverse scattering theory." @default.
- W4224016061 created "2022-04-19" @default.
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- W4224016061 date "2022-04-14" @default.
- W4224016061 modified "2023-09-29" @default.
- W4224016061 title "Semiclassical WKB Problem for the non-self-adjoint Dirac operator with an analytic rapidly oscillating potential" @default.
- W4224016061 doi "https://doi.org/10.48550/arxiv.2204.07089" @default.
- W4224016061 hasPublicationYear "2022" @default.
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