Bilinear Eigenfunction Estimates and the Nonlinear Schroedinger Equation on Surfaces
N. Burq, P. Gerard, N. Tzvetkov
Abstract
We study the cubic non linear Schrödinger equation (NLS) on compact surfaces. On the sphere S2 and more generally on Zoll surfaces, we prove that, for s>1/4, NLS is uniformly well-posed in Hs, which is sharp on the sphere. The main ingredient in our proof is a sharp bilinear estimate for Laplace spectral projectors on compact surfaces. On étudie l'équation de Schrödinger non linéaire (NLS) sur une surface compacte.Sur la sphère S2 et plus généralement sur toute surface de Zoll, on démontre que pour s>1/4, NLS est uniformément bien posée dans Hs, ce qui est optimalsur la sphère. Le principal ingrédient de notre démonstration est une estimation bilinéaire pour les projecteurs spectraux du laplacien sur une surface compacte.
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