Comb Model | Publication Types | Haroldo Valentin Ribeiro

February 24th, 2020

Anomalous diffusion and random search in xyz-comb: Exact results

We present an analytical treatment of anomalous diffusion in a three-dimensional comb (xyz-comb) by using the Green’s function approach. We […]

February 13th, 2020

Quenched and Annealed Disorder Mechanisms in Comb-Models with Fractional Operators

Recent experimental findings on anomalous diffusion have demanded novel models that combine annealed (temporal) and quenched (spatial or static) disorder […]

August 11th, 2014

Investigating the interplay between mechanisms of anomalous diffusion via fractional Brownian walks on a comb-like structure

The comb model is a simplified description for anomalous diffusion under geometric constraints. It represents particles spreading out in a […]

July 25th, 2014

First passage time for a diffusive process under a geometric constraint

We investigate the solutions, survival probability, and first passage time for a two-dimensional diffusive process subjected to the geometric constraints […]

July 25th, 2014

Solutions for a diffusion equation with a backbone term

We investigate the diffusion equation ∂t ρ = Dy ∂y2 ρ + Dx ∂x2 ρ + D ̄xδ(y)∂xμρ subjected to […]

Haroldo Valentin Ribeiro

I play with complex systems

Anomalous diffusion and random search in xyz-comb: Exact results

Quenched and Annealed Disorder Mechanisms in Comb-Models with Fractional Operators

Investigating the interplay between mechanisms of anomalous diffusion via fractional Brownian walks on a comb-like structure

First passage time for a diffusive process under a geometric constraint

Solutions for a diffusion equation with a backbone term