Numerical Simulation of Anomalous Diffusion in Levy Random Walk Processes by Monte Carlo Method

Authors

  • Anita Sharma HOD and Assistant Professor, Department of Physics, Government College, Manawar, Dhar, Madhya Pradesh, India

Keywords:

Anomalous diffusion, Levy flight, random walk, ergodicity, Monte Carlo method, Levy distribution, Gaussian distribution

Abstract

We have simulated the nonlinear behaviour of mean square displacement <r2>, with time based on Levy random walk model. By analysing different prospects, we came to the conclusion that, Levy random walk with continuous step length distribution gives rise to <r2> which behaves nonlinearly with time. This is only observable, when time average is taken and ensemble average does not lead to any nonlinearity. It also indicated the non-ergodic property of Levy distribution.

Author Biography

  • Anita Sharma, HOD and Assistant Professor, Department of Physics, Government College, Manawar, Dhar, Madhya Pradesh, India
    HOD, Asst. Prof., Physics Dept., Govt College Manawar, Madhya Pradesh, India

References

Bouchaud JP, Georges A. Anomalous diffusion in disordered media: Statistical mechanisms, models and physical applications. Phys Report. 2001; 195(4–5): 127–293. doi:10.1016/0370-1573(90)90099-N

Shlesiger MF, Klafter J, West BJ. Levy walks with applications to turbulence and chaos. Physica A. 1986; 140(1–2): 212–218. https://doi.org/10.1016/0378-4371(86)90224-4

Shlesinger MF, Zaslavsky GM, Klafter J. Strange kinetics. Nature. 1993; 363(6424): 31–37. https://doi.org/10.1038/363031a0

Tribel O, Boon JP. Pattern Formation and Lattice-Gas Automata. Fields Inst Commun. 1996; 6: 227–237.

Pantaleo E, Facchi P, Pascazio S. Simulations of Lévy flights. Physics Scripta. 2009; T135: 01403.

https://iopscience.iop.org/article/10.1088/0031-8949/2009/T135/014036,

L’Ecuyer P. Random Number Generation. In: Gentle J, Härdle W, Mori Y, editors. Handbook of Computational Statistics. Berlin, Heidelberg: Springer Handbooks of Computational Statistics, Springer; 2012. https://doi.org/10.1007/978-3-642-21551-3_3.

Collings BJ. Compound random number generators. J Am Stat Assoc. 1987; 82(398): 525–527. DOI: 10.1080/01621459.1987.10478457.

Tuma NB. Event History Analysis. Encyclopedia of Social Measurement. 2005; 859–869. https://doi.org/10.1016/B0-12-369398-5/00158-4.

Bel G, Barkai E. Occupation times and ergodicity breaking in biased continuous time random walks. J Phys: Cond Mat. 2005; 17: S4287. https://iopscience.iop.org/article/10.1088/0953-8984/17/

/021/pdf.

Ghaemi M, Zabihinpour Z, Asgari Y. Computer simulation study of the Levy flight process. Physica A. 2009; 388(8): 1509–1514. https://doi.org/10.1016/j.physa.2008.12.071

Published

2021-08-13

Issue

Section

Research Article