Stochastic Fractional Neural Operators: A Symmetrized Approach to Modeling Turbulence in Complex Fluid Dynamics

TL;DR

This paper introduces stochastic fractional neural operators combining symmetrized activations, fractional derivatives, and stochastic noise, providing a new framework for modeling turbulence with memory and uncertainty.

Contribution

It develops the mathematical foundation and convergence analysis of these operators, applying them to stochastic fractional Navier-Stokes equations for turbulence modeling.

Findings

Proves asymptotic behavior and convergence of the operators.

Demonstrates effective approximation of turbulent fluid dynamics.

Provides theoretical guarantees for modeling complex systems with memory and noise.

Abstract

In this work, we introduce a new class of neural network operators designed to handle problems where memory effects and randomness play a central role. In this work, we introduce a new class of neural network operators designed to handle problems where memory effects and randomness play a central role. These operators merge symmetrized activation functions, Caputo-type fractional derivatives, and stochastic perturbations introduced via It\^o type noise. The result is a powerful framework capable of approximating functions that evolve over time with both long-term memory and uncertain dynamics. We develop the mathematical foundations of these operators, proving three key theorems of Voronovskaya type. These results describe the asymptotic behavior of the operators, their convergence in the mean-square sense, and their consistency under fractional regularity assumptions. All estimates explicitly account for the influence of the memory parameter $\alpha$ and the noise level $\sigma$. As a practical application, we apply the proposed theory to the fractional Navier-Stokes equations with stochastic forcing, a model often used to describe turbulence in fluid flows with memory. Our approach provides theoretical guarantees for the approximation quality and suggests that these neural operators can serve as effective tools in the analysis and simulation of complex systems. By blending ideas from neural networks, fractional calculus, and stochastic analysis, this research opens new perspectives for modeling turbulent phenomena and other multiscale processes where memory and randomness are fundamental. The results lay the groundwork for hybrid learning-based methods with strong analytical backing.