157 citations · 375 across the 13 of their papers we have counts for
10 papers · 1 filter
Being Heterogeneous Is Advantageous: Extreme Brownian Non-Gaussian Searches
Vittoria Sposini, Sankaran Nampoothiri, Aleksei Chechkin +3
Redundancy in biology may be explained by the need to optimize extreme searching processes, where one or few among many particles are requested to reach the target like in human fe…
Being heterogeneous is disadvantageous: Brownian non-Gaussian searches
Vittoria Sposini, Sankaran Nampoothiri, Aleksei Chechkin +3
Diffusing diffusivity models, polymers in the grand canonical ensemble and polydisperse, and continuous-time random walks all exhibit stages of non-Gaussian diffusion. Is non-Gauss…
Towards a robust criterion of anomalous diffusion
Vittoria Sposini, Diego Krapf, Enzo Marinari +8
Anomalous-diffusion, the departure of the spreading dynamics of diffusing particles from the traditional law of Brownian-motion, is a signature feature of a large number of complex…
Exact first-passage time distributions for three random diffusivity models
D. S. Grebenkov, V. Sposini, R. Metzler +2
We study the extremal properties of a stochastic process defined by a Langevin equation , where is a Gaussian white noise with zero…
Universal spectral features of different classes of random diffusivity processes
V. Sposini, D. S. Grebenkov, R. Metzler +2
.Stochastic models based on random diffusivities, such as the diffusing-diffusivity approach, are popular concepts for the description of non-Gaussian diffusion in heterogeneous me…
Single-trajectory spectral analysis of scaled Brownian motion
Vittoria Sposini, Ralf Metzler, Gleb Oshanin
A standard approach to study time-dependent stochastic processes is the power spectral density (PSD), an ensemble-averaged property defined as the Fourier transform of the autocorr…
Random diffusivity from stochastic equations: comparison of two models for Brownian yet non-Gaussian diffusion
V. Sposini, A. V. Chechkin, F. Seno +2
A considerable number of systems have recently been reported in which Brownian yet non-Gaussian dynamics was observed. These are processes characterised by a linear growth in time…
First passage statistics for diffusing diffusivity
V. Sposini, A. V. Chechkin, R. Metzler
A rapidly increasing number of systems is identified in which the stochastic motion of tracer particles follows the Brownian law yet the d…
Finite-energy Lévy-type motion through heterogeneous ensemble of Brownian particles
Oleksii Yu. Sliusarenko, Silvia Vitali, Vittoria Sposini +4
Complex systems display anomalous diffusion, whose signature is a space/time scaling with in the Probability Density Function (PDF). Anomalous diffusion can…
Langevin equation in complex media and anomalous diffusion
Silvia Vitali, Vittoria Sposini, Oleksii Sliusarenko +3
The problem of biological motion is a very intriguing and topical issue. Many efforts are being focused on the development of novel modeling approaches for the description of anoma…