Dergi makalesi Açık Erişim
Mostafazadeh, Ali
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<subfield code="a">We introduce a notion of spectral singularity that applies for a general class of nonlinear Schrodinger operators involving a confined nonlinearity. The presence of the nonlinearity does not break the parity-reflection symmetry of spectral singularities but makes them amplitude dependent. Nonlinear spectral singularities are, therefore, associated with a resonance effect that produces amplified waves with a specific amplitude-wavelength profile. We explore the consequences of this phenomenon for a complex delta-function potential that is subject to a general confined nonlinearity.</subfield>
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<subfield code="a">10.1103/PhysRevLett.110.260402</subfield>
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<subfield code="a">Nonlinear Spectral Singularities for Confined Nonlinearities</subfield>
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