Abstract
Fractional Fokker–Planck equation plays an important role in describing anomalous dynamics. To the best of our knowledge, the existing numerical discussions mainly focus on this kind of equation involving one diffusion operator. In this paper, we first derive the fractional Fokker–Planck equation with two-scale diffusion from the Lévy process framework, and then the fully discrete scheme is built by using the \(L_{1}\) scheme for time discretization and finite element method for space. With the help of the sharp regularity estimate of the solution, we optimally get the spatial and temporal error estimates. Finally, we validate the effectiveness of the provided algorithm by extensive numerical experiments.

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References
Acosta, G., Bersetche, F.M., Borthagaray, J.P.: Finite element approximations for fractional evolution problems. Fract. Calc. Appl. Anal. 22, 767–794 (2019)
Acosta, G., Borthagaray, J.P.: A fractional Laplace equation: regularity of solutions and finite element approximations. SIAM J. Numer. Anal. 55, 472–495 (2017)
Adams, R.A., Fournier, J.J.F.: Sobolev Spaces, 2nd edn. Academic Press, Amsterdam (2003)
Applebaum, D.: Lévy Processes and Stochastic Calculus, 2nd edn. Cambridge University Press, Cambridge (2009)
Bazhlekova, E., Jin, B., Lazarov, R., Zhou, Z.: An analysis of the Rayleigh–Stokes problem for a generalized second-grade fluid. Numer. Math. 131, 1–31 (2015)
Bonito, A., Lei, W., Pasciak, J.E.: Numerical approximation of the integral fractional Laplacian. Numer. Math. 142, 235–278 (2019)
Bonito, A., Lei, W., Salgado, A.J.: Finite element approximation of an obstacle problem for a class of integro-differential operators. ESAIM M2AN 54, 229–253 (2020)
Bonito, A., Pasciak, J.E.: Numerical approximation of fractional powers of regularly accretive operators. IMA J. Numer. Anal. 37, 1245–1273 (2016)
Di Nezza, E., Palatucci, G., Valdinoci, E.: Hitchhiker’s guide to the fractional Sobolev spaces. Bull. Sci. Math. 136, 521–573 (2012)
Elliott, C.M., Larsson, S.: Error estimates with smooth and nonsmooth data for a finite element method for the Cahn–Hilliard equation. Math. Comp. 58, 603 (1992)
Jin, B., Lazarov, R., Zhou, Z.: An analysis of the L1 scheme for the subdiffusion equation with nonsmooth data. IMA J. Numer. Anal. 36, 197–211 (2016)
Jin, B., Lazarov, R., Zhou, Z.: Numerical methods for time-fractional evolution equations with nonsmooth data: a concise overview. Comput. Methods Appl. Mech. Eng. 346, 332–358 (2019)
Jin, B., Yan, Y., Zhou, Z.: Numerical approximation of stochastic time-fractional diffusion. ESAIM M2AN 53, 1245–1268 (2019)
Lewin, L.: Polylogarithms and Associated Functions. North-Holland, New York (1981)
Lin, Y., Xu, C.: Finite difference/spectral approximations for the time-fractional diffusion equation. J. Comput. Phys. 225, 1533–1552 (2007)
Lubich, C., Sloan, I.H., Thomée, V.: Nonsmooth data error estimates for approximations of an evolution equation with a positive-type memory term. Math. Comp. 65, 1–18 (1996)
Nie, D., Deng, W.: Numerical analysis for stochastic time-space fractional diffusion equation driven by fractional Gaussian noise. http://arxiv.org/pdf/2101.01963v1
Nie, D., Sun, J., Deng, W.: Numerical algorithm for the space-time fractional Fokker–Planck system with two internal states. Numer. Math. 146, 481–511 (2020)
Podlubny, I.: Fractional Differential Equations. Academic, San Diego (1999)
Thomée, V.: Galerkin Finite Element Methods for Parabolic Problems, 2nd edn. Springer, Berlin (2006)
Yan, Y., Khan, M., Ford, N.J.: An analysis of the modified L1 scheme for time-fractional partial differential equations with nonsmooth data. SIAM J. Numer. Anal. 56, 210–227 (2018)
Acknowledgements
This work was supported by National Natural Science Foundation of China under Grant No. 12071195, AI and Big Data Funds under Grant No. 2019620005000775, Fundamental Research Funds for the Central Universities under Grant Nos. lzujbky-2021-it26 and lzujbky-2021-kb15, and NSF of Gansu under Grant No. 21JR7RA537.
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Sun, J., Deng, W. & Nie, D. Numerical Approximations for the Fractional Fokker–Planck Equation with Two-Scale Diffusion. J Sci Comput 91, 34 (2022). https://doi.org/10.1007/s10915-022-01812-z
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DOI: https://doi.org/10.1007/s10915-022-01812-z