Zobrazeno 1 - 10
of 534
pro vyhledávání: '"Guérin, T."'
The Kramers escape problem is a paradigmatic model for the kinetics of rare events, which are usually characterized by Arrhenius law. So far, analytical approaches have failed to capture the kinetics of rare events in the important case of non-Markov
Externí odkaz:
http://arxiv.org/abs/2406.04720
We consider the motion of a harmonically trapped overdamped particle, which is submitted to a self-phoretic force, that is proportional to the gradient of a diffusive field for which the particle itself is the source. In agreement with existing resul
Externí odkaz:
http://arxiv.org/abs/2403.07426
Autor:
Dolgushev, M., Mendes, T. V., Gorin, B., Xie, K., Levernier, N., Bénichou, O., Kellay, H., Voituriez, R., Guérin, T.
Splitting probabilities quantify the likelihood of a given outcome out of competitive events for general random processes. This key observable of random walk theory, historically introduced as the Gambler's ruin problem for a player in a casino, has
Externí odkaz:
http://arxiv.org/abs/2402.05005
Autor:
Gobet, F., Barberet, P., Delville, M. -H., Devès, G., Guérin, T., Liénard, R., Tran, H. N., Vecco-Garda, C., Würger, A., Zein, S., Seznec, H.
Publikováno v:
Phys.Rev.Lett. 131, 178001 (2023)
We study the effects of irradiating water with 3 MeV protons at high doses by observing the motion of charged polystyrene beads outside the proton beam. By single-particle tracking, we measure a radial velocity of the order of microns per second. Com
Externí odkaz:
http://arxiv.org/abs/2310.15249
We consider the kinetics of the imperfect narrow escape problem, i.e. the time it takes for a particle diffusing in a confined medium of generic shape to reach and to be adsorbed by a small, imperfectly reactive patch embedded in the boundary of the
Externí odkaz:
http://arxiv.org/abs/2305.06135
Persistence, defined as the probability that a fluctuating signal has not reached a threshold up to a given observation time, plays a crucial role in the theory of random processes. It quantifies the kinetics of processes as varied as phase ordering,
Externí odkaz:
http://arxiv.org/abs/2201.03441
Publikováno v:
J. Chem. Phys. 152, 234109 (2020)
We revisit the classic problem of the effective diffusion constant of a Brownian particle in a square lattice of reflecting impenetrable hard disks. This diffusion constant is also related to the effective conductivity of non-conducting and infinitel
Externí odkaz:
http://arxiv.org/abs/2111.04354
Publikováno v:
Journal of Statistical Mechanics: Theory and Experiment (2021) 113205
Optically trapped particles are often subject to a non-conservative scattering force arising from radiation pressure. In this paper we present an exact solution for the steady state statistics of an overdamped Brownian particle subjected to a commonl
Externí odkaz:
http://arxiv.org/abs/2110.04362
Publikováno v:
Nature Communications 2019
For many stochastic processes, the probability $S(t)$ of not-having reached a target in unbounded space up to time $t$ follows a slow algebraic decay at long times, $S(t)\sim S_0/t^\theta$. This is typically the case of symmetric compact (i.e. recurr
Externí odkaz:
http://arxiv.org/abs/1907.03632
Publikováno v:
J. Chem. Phys. 149, 124105 (2018)
The effective diffusivity of Brownian tracer particles confined in periodic micro-channels is smaller than the microscopic diffusivity due to entropic trapping. Here, we study diffusion in two-dimensional periodic channels whose cross-section present
Externí odkaz:
http://arxiv.org/abs/1807.05366