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Stochastic Regularization in Nonlinear Transport

Authors: Nam Anh Quach;

Stochastic Regularization in Nonlinear Transport

Abstract

Nonlinear transport equations often exhibit severe gradient amplification when subjected to super-linear feedback, leading to instability along characteristic trajectories. Classical stochastic perturbations introduced through additive noise typically disperse trajectories without modifying the underlying transport operator responsible for this amplification.&nbsp; <div> In this work we investigate the stabilizing role of stochastic transport perturbations introduced through the Stochastic Advection by Lie Transport (SALT) framework. By applying the Stratonovich-Itô conversion to the stochastic Lagrangian flow, we show that SALT dynamics generate an emergent deterministic second-order spatial operator in the Eulerian formulation. When the covariance tensor of the transport perturbations is uniformly nondegenerate, this operator introduces a dissipative contribution that suppresses gradient amplification in expectation.&nbsp; </div> <div> In the limit of isotropic spatial noise, the stochastic transport operator converges formally to a Laplacian with effective viscosity determined by the trace of the transport covariance tensor. Numerical experiments illustrate the convergence of the ensemble-averaged stochastic dynamics toward the corresponding viscous limit.&nbsp; </div> <div> These results provide a structural link between stochastic transport models and classical dissipative regularization mechanisms in nonlinear transport systems. </div>

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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