Low regularity exponential-type integrators for nonlinear Schrödinger equations

Relatore
Alexander Ostermann - Universität Innsbruck
Data e ora
mercoledì 3 maggio 2017 alle ore 16.30 - Rinfresco 16.15, inizio seminario 16.30.
Luogo
Ca' Vignal - Piramide, Piano 0, Sala Verde
Referente
Referente esterno
Data pubblicazione
18 aprile 2017
Dipartimento
Informatica  

Riassunto

Nonlinear Schrödinger equations are usually solved by pseudo-spectral methods where the time integration is performed by splitting schemes or exponential integrators. Notwithstanding the benefits of this approach, its successful application requires additional regularity of the solution. In this talk, we introduce as an alternative low regularity exponential-type integrators.

For such methods, first-order convergence only requires the boundedness of one additional derivative of the solution. This allows us to impose lower regularity assumptions on the data than for instance required for classical splitting or exponential integration schemes. For one dimensional quadratic Schrödinger equations we can even prove first-order convergence without any loss of regularity. Numerical experiments underline the favorable error behavior of the newly introduced exponential-type integrators for low regularity solutions compared to classical splitting and exponential integration schemes.

Contact Person: Marco Caliari





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