Abstract
This article analyses the convergence of the Lie–Trotter splitting scheme for the stochastic Manakov equation, a system arising in the study of pulse propagation in randomly birefringent optical fibers. First, we prove that the strong order of the numerical approximation is 1/2 if the nonlinear term in the system is globally Lipschitz. Then, we show that the splitting scheme has convergence order 1/2 in probability and almost sure order \({{\frac{1}{2}-}}\) in the case of a cubic nonlinearity. We provide several numerical experiments illustrating the aforementioned results and the efficiency of the Lie–Trotter splitting scheme. Finally, we numerically investigate the possible blowup of solutions for some power-law nonlinearities.
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Acknowledgements
We appreciate the referees’ comments on an earlier version of the paper. Part of the work of D. Cohen was carried out when working for the Department of Mathematics and Mathematical Statistics at Umeå University.
Funding
This work was partially supported by the Swedish Research Council (VR) (project nr. \(2018-04443\)), FRÖ the mobility programs of the French Embassy/Institut français de Suède, and INRIA Lille Nord-Europe. G. Dujardin was partially supported by the Labex CEMPI (ANR-11-LABX-0007-01). The computations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at HPC2N, Umeå University.
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Berg, A., Cohen, D. & Dujardin, G. Lie–Trotter Splitting for the Nonlinear Stochastic Manakov System. J Sci Comput 88, 6 (2021). https://doi.org/10.1007/s10915-021-01514-y
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DOI: https://doi.org/10.1007/s10915-021-01514-y
Keywords
- Stochastic partial differential equations
- Stochastic Manakov equation
- Coupled system of stochastic nonlinear Schrödinger equations
- Numerical schemes
- Splitting scheme
- Lie–Trotter scheme
- Strong convergence
- Convergence in probability
- Almost sure convergence
- Convergence rates
- Blowup