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On positive multi-lump bound states of nonlinear Schrödinger equations under multiple well potential. (English) Zbl 0753.35097

The author considers nonlinear Schrödinger equations with an additional linear potential \(V\) of class \((V)_ a\) in the sense of Kato and an attractive power law nonlinearity. He proves the existence of special solutions of type \(\exp(-iEt/h)\cdot v(x)\) (called multi-lump bound states) for each finite collection of nondegenerate critical points of \(V\); here \(v(x)\) is a real small perturbation of a sum of one-lump solutions concentrated near one critical point resp. of the potential \(V\).
This generalizes results of A. Floer and A. Weinstein on one- lump solutions for bounded potentials [J. Funct. Anal. 69, 397-408 (1986; Zbl 0613.35076)]. The crucial technical point is a new estimate of the norm of a certain Fredholm inverse which is not needed in the one-lump case.
Reviewer: H.Lange (Köln)

MSC:

35Q55 NLS equations (nonlinear Schrödinger equations)
81Q05 Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other equations of quantum mechanics

Citations:

Zbl 0613.35076
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References:

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