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Soliton stability versus collapse
1Commissariat a l'Energie Atomique, CEA-DAM/Ile-de-France, B.P. 12, 91680 Bruyeres-le-Chainsertion marktel, France.
Abstract:
Nonlinear Schrodinger equations with positive potentials are investigated. Stability of their stationary ground states is confronted with properties of nonlinear blow-up. The stability condition for these soliton modes is shown to involve restrictions on the potential slope, which do not forbid the collapse. We prove that stable ground states must have a power integral below their counterpart with no potential.
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