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In many biological situations, a species arriving from a remote source diffuses in a domain confined between two parallel surfaces until it finds a binding partner. Since such a geometric shape falls in between two- and three-dimensional…

化学物理 · 物理学 2019-11-05 Denis S. Grebenkov , Diego Krapf

In a standard bifurcation of a dynamical system, the stationary points (or more generally attractors) change qualitatively when varying a control parameter. Here we describe a novel unusual effect, when the change of a parameter, e.g. a…

种群与进化 · 定量生物学 2017-04-26 V. I. Yukalov , E. P. Yukalova , D. Sornette

We investigate symmetry breaking in a time-dependent billiard that undergoes a continuous phase transition when dissipation is introduced. The system presents unlimited velocity, and thus energy growth for the conservative dynamics. When…

混沌动力学 · 物理学 2025-08-18 Anne Kétri Pasquinelli da Fonseca , Edson Denis Leonel

We numerically and analytically investigate the behavior of a non-equilibrium phase transition in the second Schl\"ogl autocatalytic reaction scheme. Our model incorporates both an interaction-induced phase separation and a bifurcation in…

统计力学 · 物理学 2023-11-02 Reda Tiani , Uwe C. Täuber

We propose a new method to obtain kinetic properties of infrequent events from molecular dynamics simulation. The procedure employs a recently introduced variational approach [Valsson and Parrinello, Phys. Rev. Lett. 113, 090601 (2014)] to…

统计力学 · 物理学 2015-08-19 James McCarty , Omar Valsson , Pratyush Tiwary , Michele Parrinello

Understanding anomalous transport and reaction kinetics due to microscopic physical and chemical disorder is a long-standing goal in many fields including geophysics, biology, and engineering. We consider reaction-diffusion characterized by…

软凝聚态物质 · 物理学 2017-10-11 Gerald J. Lapeyre , Marco Dentz

Static and dynamic properties of two-dimensional bidisperse dissipative particles are numerically studied near the jamming transition. We investigate the dependency of the critical scaling on the ratio of the different diameters and find a…

软凝聚态物质 · 物理学 2015-06-11 Kuniyasu Saitoh , Vanessa Magnanimo , Stefan Luding

Granular systems present surprisingly complicated dynamics. In particular, nonlinear interactions and energy dissipation play important roles in these dynamics. Usually, constant coefficients of restitution are introduced phenomenologically…

软凝聚态物质 · 物理学 2014-08-29 Italo'Ivo Lima Dias Pinto , Alexandre Rosas , Katja Lindenberg

In relativistic heavy-ion collisions, properties of the initial state and effects arising during evolution of the medium, such as a transition between the hadronic and partonic phases, should reflect themselves in event-by-event…

高能物理 - 唯象学 · 物理学 2019-04-05 Igor Altsybeev

We show that the quasifission paths predicted by the one-body dissipation dynamics, in the slowest phase of a binary reaction, follow a quasistatic path, which represents a sequence of states of thermal equilibrium at a fixed value of the…

核理论 · 物理学 2008-11-26 V. P. Aleshin , M. Centelles , X. Viñas , N. G. Nicolis

The onset of collision dynamics between an ion and a Rydberg atom is studied in a regime characterized by a multitude of collision channels. These channels arise from coupling between a non-polar Rydberg state and numerous highly polar…

We study fluctuations in diffusion-limited reaction systems driven out of their stationary state. Using a numerically exact method, we investigate fluctuation ratios in various systems which differ by their level of violation of microscopic…

统计力学 · 物理学 2009-11-13 Sven Dorosz , Michel Pleimling

Stochasticity plays important roles in reaction systems. Vector fields of probability flux and velocity characterize time-varying and steady-state properties of these systems, including high probability paths, barriers, checkpoints among…

分子网络 · 定量生物学 2018-12-05 Anna Terebus , Chun Liu , Jie Liang

Failure of amorphous materials is characterized by the emergence of dissipation. The connection between particle dynamics, dissipation, and overall material rheology, however, has still not been elucidated. Here, we take a new approach…

软凝聚态物质 · 物理学 2021-08-09 K. L. Galloway , D. J. Jerolmack , P. E. Arratia

Non-Maxwellian distributions are commonly observed across a wide range of systems and scales. While direct observations provide the strongest evidence for these distributions, they also manifest indirectly through their influence on…

统计力学 · 物理学 2024-12-17 Kamel Ourabah

We consider the reaction zone that grows between separated regions of diffusing species $A$ and $B$ that react according to $mA+nB\to 0$, within the framework of the mean-fieldlike reaction-diffusion equations. For distances from the centre…

凝聚态物理 · 物理学 2009-10-22 Stephen Cornell , Zbigniew Koza , Michel Droz

In cosmological first-order phase transitions, the microscopic interaction of the phase transition fronts with non-equilibrium plasma particles manifests itself macroscopically as friction forces. In general, it is a nontrivial problem to…

宇宙学与河外天体物理 · 物理学 2015-06-15 Ariel Megevand

We study the problem of the transformation of a given reactant species into an immiscible product species, as they flow through a chemically active porous medium. We derive the equation governing the evolution of the volume fraction of the…

流体动力学 · 物理学 2015-01-06 Alexandre Darmon , Michael Benzaquen , Thomas Salez , Olivier Dauchot

The evolution of the interface between two ideal dielectric liquids in a strong vertical electric field is studied. It is found that a particular flow regime, for which the velocity potential and the electric field potential are linearly…

流体动力学 · 物理学 2009-11-11 Nikolay M. Zubarev

Rate- and state-dependent friction law for velocity-step tests is analyzed from a thermodynamic point of view. A simple macroscopic non-equilibrium thermodynamic model with a single internal variable reproduces instantaneous jump and…

地球物理 · 物理学 2014-11-19 Noa Mitsui , P. Ván