Neumann Schrödinger Estimates in Cylindrical Domains
Abstract
We establish sharp local-in-time dispersive estimates and global Strichartz estimates for the semiclassical Schrödinger equation in a three-dimensional cylindrical domain Ω⊂ℝ3 with homogeneous Neumann boundary conditions. The partially flat boundary leads to a degeneracy of curvature in the longitudinal direction and produces persistent glancing interactions that distinguish the cylindrical setting from strictly convex domains. At the spectral level, the Neumann condition is reflected in the appearance of the zeros of the Airy derivative in place of the Airy zeros associated with Dirichlet boundary conditions. Using semiclassical microlocal analysis, oscillatory integral estimates, and an Airy--Poisson summation formula adapted to Neumann reflection, we obtain uniform dispersive bounds for the localized Schrödinger propagator. The quadratic structure of the Schrödinger phase yields a uniform treatment of the low-frequency regime and, combined with the boundary-layer analysis, leads to global Strichartz estimates with derivative loss ρ(q)=3/2(1/2−1/q). As an application, we prove local well-posedness in Hs(Ω), s>1, for the cubic nonlinear Schrödinger equation with either focusing or defocusing sign and homogeneous Neumann boundary conditions. These results quantify the effect of partially flat boundary geometry on Schrödinger dispersion and provide a sharp linear framework for the corresponding nonlinear dynamics.
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BibTeX
@misc{meas2026neumann,
title = {{Neumann Schrödinger Estimates in Cylindrical Domains}},
author = {Len Meas},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.09378},
eprint = {2610.09378},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.09378},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Neumann Schrödinger Estimates in Cylindrical Domains
AU - Len Meas
PY - 2026
DA - 2026/10/07
PB - arXiv
DO - 10.48550/arxiv.2610.09378
UR - https://arxiv.org/abs/2610.09378
AB - We establish sharp local-in-time dispersive estimates and global Strichartz estimates for the semiclassical Schrödinger equation in a three-dimensional cylindrical domain Ω⊂ℝ^3 with homogeneous Neumann boundary conditions. The partially flat boundary leads to a degeneracy of curvature in the longitudinal direction and produces persistent glancing interactions that distinguish the cylindrical setting from strictly convex domains. At the spectral level, the Neumann condition is reflected in the appearance of the zeros of the Airy derivative in place of the Airy zeros associated with Dirichlet boundary conditions. Using semiclassical microlocal analysis, oscillatory integral estimates, and an Airy--Poisson summation formula adapted to Neumann reflection, we obtain uniform dispersive bounds for the localized Schrödinger propagator. The quadratic structure of the Schrödinger phase yields a uniform treatment of the low-frequency regime and, combined with the boundary-layer analysis, leads to global Strichartz estimates with derivative loss ρ(q)=3/2(1/2−1/q). As an application, we prove local well-posedness in H^s(Ω), s>1, for the cubic nonlinear Schrödinger equation with either focusing or defocusing sign and homogeneous Neumann boundary conditions. These results quantify the effect of partially flat boundary geometry on Schrödinger dispersion and provide a sharp linear framework for the corresponding nonlinear dynamics.
ER -