The interior-boundary Strichartz estimate for the Schrödinger equation on the half line revisited

It was shown by the second author in (CPAA, 2019) for the biharmonic Schrödinger equation and most recently by Himonas and Mantzavinos (Nonlinearity, 2020) for 2D Schrödinger equation that Fokas method based formulas are capable of defining weak solutions of associated nonlinear initial boundary value problems (ibvps) below the Banach algebra threshold. In view of these results, we revisit the theory of interior-boundary Strichartz estimates for the Schrödinger equation posed on the right half line, considering both Dirichlet and Neumann cases. Finally, we apply these estimates to obtain low regularity solutions for the nonlinear Schrödinger equation (NLS) with Neumann boundary condition and a coupled system of NLS equations defined on the half line with Dirichlet/Neumann boundary conditions.

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