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On a class of spatial discretizations of equations of the nonlinear Schrödinger type

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  • Kevrekidis, P.G.
  • Dmitriev, S.V.
  • Sukhorukov, A.A.

Abstract

We demonstrate the systematic derivation of a class of discretizations of nonlinear Schrödinger (NLS) equations for general polynomial nonlinearity whose stationary solutions can be found from a reduced two-point algebraic condition. We then focus on the cubic problem and illustrate how our class of models compares with the well-known discretizations such as the standard discrete NLS equation, or the integrable variant thereof. We also discuss the conservation laws of the derived generalizations of the cubic case, such as the lattice momentum or mass and the connection with their corresponding continuum siblings.

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  • Kevrekidis, P.G. & Dmitriev, S.V. & Sukhorukov, A.A., 2007. "On a class of spatial discretizations of equations of the nonlinear Schrödinger type," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 74(4), pages 343-351.
    • Handle: RePEc:eee:matcom:v:74:y:2007:i:4:p:343-351
    DOI: 10.1016/j.matcom.2006.10.014
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    Cited by:

    1. LeMesurier, Brenton, 2012. "Studying Davydov’s ODE model of wave motion in α-helix protein using exactly energy–momentum conserving discretizations for Hamiltonian systems," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 82(7), pages 1239-1248.

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