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Convergence analysis of a Schrödinger problem with moving boundary

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  • Alfaro Vigo, Daniel G.
  • Gomes, Daniele C.R.
  • do Carmo, Bruno A.
  • Rincon, Mauro A.

Abstract

In this article, we present the mathematical analysis of the convergence of the linearized Crank–Nicolson Galerkin method for a nonlinear Schrödinger problem related to a domain with a moving boundary. The convergence analysis of the numerical method is carried out for both semidiscrete and fully discrete problems. We establish an optimal error estimate in the L2-norm with order O(τ2+hs),2≤s≤r, where h is the finite element mesh size, τ is the time step, and r−1 represents the degree of the finite element polynomial basis. Numerical simulations are provided to confirm the consistency between theoretical and numerical results, validating the method and the order of convergence for different degrees p≥1 of the Lagrange polynomials and also for Hermite polynomials (degree p=3), which form the basis of the approximate solution.

Suggested Citation

  • Alfaro Vigo, Daniel G. & Gomes, Daniele C.R. & do Carmo, Bruno A. & Rincon, Mauro A., 2025. "Convergence analysis of a Schrödinger problem with moving boundary," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 238(C), pages 45-64.
    • Handle: RePEc:eee:matcom:v:238:y:2025:i:c:p:45-64
    DOI: 10.1016/j.matcom.2025.04.042
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    1. M. W. Ray & E. Ruokokoski & S. Kandel & M. Möttönen & D. S. Hall, 2014. "Observation of Dirac monopoles in a synthetic magnetic field," Nature, Nature, vol. 505(7485), pages 657-660, January.
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    3. Shi, Dongyang & Liao, Xin & Wang, Lele, 2016. "Superconvergence analysis of conforming finite element method for nonlinear Schrödinger equation," Applied Mathematics and Computation, Elsevier, vol. 289(C), pages 298-310.
    4. S. van Frank & A. Negretti & T. Berrada & R. Bücker & S. Montangero & J.-F. Schaff & T. Schumm & T. Calarco & J. Schmiedmayer, 2014. "Interferometry with non-classical motional states of a Bose–Einstein condensate," Nature Communications, Nature, vol. 5(1), pages 1-6, September.
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