186 citations · 1.1k across the 33 of their papers we have counts for
36 papers
Rheology of dense vibrated granular flows: non-monotonic response controlled by granular temperature
A. Plati, G. Petrillo, L. de Arcangelis +4
We study the rheology of dense granular materials subjected to vertical vibration {by} using numerical simulations of a stress-imposed vane rheometer. The effective viscosity incre…
Thermodynamic uncertainty relations in the presence of non-linear friction and memory
A. Plati, A. Puglisi, A. Sarracino
A new Thermodynamic Uncertainty Relation (TUR) is derived for systems described by linearly coupled Langevin equations in the presence of non-linear frictional forces. In our schem…
The Many Faces of Fluctuation-Dissipation Relations Out of Equilibrium
Marco Baldovin, Lorenzo Caprini, Andrea Puglisi +2
In this paper, we offer to the reader an essential review of the theory of Fluctuation-Dissipation Relations (FDR), from the first formulations due to Einstein and Onsager, to the…
Thermodynamic bounds for diffusion in non-equilibrium systems with multiple timescales
Andrea Plati, Andrea Puglisi, Alessandro Sarracino
We derive a Thermodynamic Uncertainty Relation bounding the mean squared displacement of a Gaussian process with memory, driven out of equilibrium by unbalanced thermal baths and/o…
Fluctuation-Dissipation Relations in Active Matter Systems
Lorenzo Caprini, Andrea Puglisi, Alessandro Sarracino
We investigate the non-equilibrium character of self-propelled particles through the study of the linear response of the active Ornstein-Uhlenbeck particle (AOUP) model. We express…
On the Fluctuation-Dissipation Relation in non-equilibrium and non-Hamiltonian systems
A. Sarracino, A. Vulpiani
We review generalized Fluctuation-Dissipation Relations which are valid under general conditions even in ``non-standard systems'', e.g. out of equilibrium and/or without a Hamilton…
Anomalous mobility of a driven active particle in a steady laminar flow
F. Cecconi, A. Puglisi, A. Sarracino +1
We study, via extensive numerical simulations, the force-velocity curve of an active particle advected by a steady laminar flow, in the nonlinear response regime. Our model for an…
Controlled viscosity in dense granular materials
A. Gnoli, L. de Arcangelis, F. Giacco +4
We experimentally investigate the fluidization of a granular material subject to mechanical vibrations by monitoring the angular velocity of a vane suspended in the medium and driv…
Temperature in and out of equilibrium: a review of concepts, tools and attempts
A. Puglisi, A. Sarracino, A. Vulpiani
We review the general aspects of the concept of temperature in equilibrium and non-equilibrium statistical mechanics. Although temperature is an old and well-established notion, it…
About thermometers and temperature
M. Baldovin, A. Puglisi, A. Sarracino +1
We discuss a class of mechanical models of thermometers and their minimal requirements to determine the temperature for systems out of the common scope of thermometry. In particula…
Anomalous force-velocity relation of driven inertial tracers in steady laminar flows
F. Cecconi, A. Puglisi, A. Sarracino +1
We study the nonlinear response to an external force of an inertial tracer advected by a two-dimensional incompressible laminar flow and subject to thermal noise. In addition to th…
Fourier's Law in a Generalized Piston Model
Lorenzo Caprini, Luca Cerino, Alessandro Sarracino +1
A simplified, but non trivial, mechanical model -- gas of particles of mass in a box partitioned by mobile adiabatic walls of mass -- interacting with two thermal b…
Nonlinear response of inertial tracers in steady laminar flows: differential and absolute negative mobility
A. Sarracino, F. Cecconi, A. Puglisi +1
We study the mobility and the diffusion coefficient of an inertial tracer advected by a two-dimensional incompressible laminar flow, in the presence of thermal noise and under the…
Unified rheology of vibro-fluidized dry granular media: From slow dense flows to fast gas-like regimes
Andrea Gnoli, Antonio Lasanta, Alessandro Sarracino +1
Granular media take on great importance in industry and geophysics, posing a severe challenge to materials science. Their response properties elude known soft rheological models, e…
Coarsening in granular systems
Andrea Baldassarri, Andrea Puglisi, Alessandro Sarracino
We review a few representative examples of granular experiments or models where phase separation, accompanied by domain coarsening, is a relevant phenomenon. We first elucidate the…
Scaling properties of field-induced superdiffusion in Continous Time Random Walks
R. Burioni, G. Gradenigo, A. Sarracino +2
We consider a broad class of Continuous Time Random Walks with large fluctuations effects in space and time distributions: a random walk with trapping, describing subdiffusion in d…
Nonequilibrium Brownian motion beyond the effective temperature
Andrea Gnoli, Andrea Puglisi, Alessandro Sarracino +1
The condition of thermal equilibrium simplifies the theoretical treatment of fluctuations as found in the celebrated Einstein's relation between mobility and diffusivity for Browni…
Fluctuations in partitioning systems with few degrees of freedom
L. Cerino, G. Gradenigo, A. Sarracino +2
We study the behavior of a moving wall in contact with a particle gas and subjected to an external force. We compare the fluctuations of the system observed in the microcanonical a…
Coulomb friction driving Brownian motors
Alessandro Manacorda, Andrea Puglisi, Alessandro Sarracino
We review a family of models recently introduced to describe Brownian motors under the influence of Coulomb friction, or more general non-linear friction laws. It is known that, if…
Time asymmetry of the Kramers equation with nonlinear friction: fluctuation-dissipation relation and ratchet effect
A. Sarracino
We show by numerical simulations that the presence of nonlinear velocity-dependent friction forces can induce a finite net drift in the stochastic motion of a particle in contact w…
Ratchet effect driven by Coulomb friction: the asymmetric Rayleigh piston
A. Sarracino, A. Gnoli, A. Puglisi
The effect of Coulomb friction is studied in the framework of collisional ratchets. It turns out that the average drift of these devices can be expressed as the combination of a te…
Non-equilibrium fluctuations in frictional granular motor: experiments and kinetic theory
Andrea Gnoli, Alessandro Sarracino, Alberto Petri +1
We report the study of a new experimental granular Brownian motor, inspired to the one published in [Phys. Rev. Lett. 104, 248001 (2010)], but different in some ingredients. As in…
Fluctuation relations without uniform large deviations
Giacomo Gradenigo, Alessandro Sarracino, Andrea Puglisi +1
We study the fluctuations of a stochastic Maxwell-Lorentz particle model driven by an external field to determine the extent to which fluctuation relations are related to large dev…
Rare events and scaling properties in field-induced anomalous dynamics
R. Burioni, G. Gradenigo, A. Sarracino +2
We show that, in a broad class of continuous time random walks (CTRW), a small external field can turn diffusion from standard into anomalous. We illustrate our findings in a CTRW…