A Degenerate Edge Bifurcation in the 1d Linearized Nonlinear Schrödinger Equation
نویسندگان
چکیده
This work deals with the focusing Nonlinear Schrödinger Equation in one dimension with pure-power nonlinearity near cubic. We consider the spectrum of the linearized operator about the soliton solution. When the nonlinearity is exactly cubic, the linearized operator has resonances at the edges of the essential spectrum. We establish the degenerate bifurcation of these resonances to eigenvalues as the nonlinearity deviates from cubic. The leadingorder expression for these eigenvalues is consistent with previous numerical computations.
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