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arXiv · 2209.09771

Brownian non-Gaussian diffusion of self-avoiding walks

Boris Marcone·Sankaran Nampoothiri·Enzo Orlandini·Flavio Seno·Fulvio Baldovin
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Abstract

Three-dimensional Monte Carlo simulations provide a striking confirmation to a recent theoretical prediction: the Brownian non-Gaussian diffusion of critical self-avoiding walks. Although the mean square displacement of the polymer center of mass grows linearly with time (Brownian behavior), the initial probability density function is strongly non-Gaussian and crosses over to Gaussianity only at large time. Full agreement between theory and simulations is achieved without the employment of fitting parameters. We discuss simulation techniques potentially capable of addressing the study of anomalous diffusion under complex conditions like adsorption- or Theta-transition.

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Boris Marcone, Sankaran Nampoothiri, Enzo Orlandini, Flavio Seno, Fulvio Baldovin. 2022-09-20. Brownian non-Gaussian diffusion of self-avoiding walks. https://doi.org/10.1088/1751-8121%2Fac83fd

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