“…We finish these comments with posing another interesting open problem: Is it possible to generalize the uniqueness to other geometries (in particular bounded or unbounded do-mains and non-compact manifolds). The existence in the latter cases is proved in the recent paper [31] by the second named author. In Remark 3.5 we explained why we couldn't apply the approach from the present paper to prove uniqueness for these geometries.…”
Section: Concluding Remarks and Open Questionsmentioning
confidence: 88%
“…Instead of using a fixed point argument, we separate the proof of the existence and the uniqueness. The construction of a martingale solution has been treated by the authors in [9] and the second author in [31] based on the Hamiltonian structure of the NLS without using the Strichartz estimates. Since these ingredients are independent of the underlying geometry, the existence proof works in a more general framework including non-compact manifolds and domains with Neumann or Dirichlet boundary in arbitrary dimension.…”
We prove the pathwise uniqueness of solutions of the nonlinear Schrödinger equation with conservative multiplicative noise on compact 3D manifolds. In particular, we generalize the result by Burq, Gérard and Tzvetkov, [7], to the stochastic setting. The proof is based on the deterministic and new stochastic spectrally localized Strichartz estimates and the Littlewood-Paley decomposition.
“…We finish these comments with posing another interesting open problem: Is it possible to generalize the uniqueness to other geometries (in particular bounded or unbounded do-mains and non-compact manifolds). The existence in the latter cases is proved in the recent paper [31] by the second named author. In Remark 3.5 we explained why we couldn't apply the approach from the present paper to prove uniqueness for these geometries.…”
Section: Concluding Remarks and Open Questionsmentioning
confidence: 88%
“…Instead of using a fixed point argument, we separate the proof of the existence and the uniqueness. The construction of a martingale solution has been treated by the authors in [9] and the second author in [31] based on the Hamiltonian structure of the NLS without using the Strichartz estimates. Since these ingredients are independent of the underlying geometry, the existence proof works in a more general framework including non-compact manifolds and domains with Neumann or Dirichlet boundary in arbitrary dimension.…”
We prove the pathwise uniqueness of solutions of the nonlinear Schrödinger equation with conservative multiplicative noise on compact 3D manifolds. In particular, we generalize the result by Burq, Gérard and Tzvetkov, [7], to the stochastic setting. The proof is based on the deterministic and new stochastic spectrally localized Strichartz estimates and the Littlewood-Paley decomposition.
“…However here we generalise that setting by dealing with a random initial data and more general diffusion terms. One should mention here that a very recent paper [Hor20] provides another generalisation [BHW19] in the direction of stochastic NLS equations on unbounded domains and non-compact manifolds.…”
We consider a stochastic nonlinear defocusing Schrödinger equation with zero-order linear damping, where the stochastic forcing term is given by a combination of a linear multiplicative noise in the Stratonovich form and a nonlinear noise in the Itô form. We work at the same time on compact Riemannian manifolds without boundary and on relatively compact smooth domains with either the Dirichlet or the Neumann boundary conditions, always in dimension two. We construct a martingale solution using a modified Faedo–Galerkin’s method, following Brzeźniak et al (2019 Probab. Theory Relat. Fields
174 1273–338). Then by means of the Strichartz estimates deduced from Blair et al (2008 Proc. Am. Math. Soc.
136 247–56) but modified for our stochastic setting we show the pathwise uniqueness of solutions. Finally, we prove the existence of an invariant measure by means of a version of the Krylov–Bogoliubov method, which involves the weak topology, as proposed by Maslowski and Seidler (1999 Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei (9) Mat. Appl.
10 69–78). This is the first result of this type for stochastic nonlinear Schrödinger equation (NLS) on compact Riemannian manifolds without boundary and on relatively compact smooth domains even for an additive noise. Some remarks on the uniqueness in a particular case are provided as well.
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