DEFOORT, Martial; PULLER, Vadim; BOURGEOIS, Olivier; PISTOLESI, Fabio; COLLIN, Eddy

doi:10.1103/PhysRevE.92.050903

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DEFOORT, Martial
Ultra-basses températures [NEEL - UBT]

PULLER, Vadim
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

BOURGEOIS, Olivier
Thermodynamique et biophysique des petits systèmes [NEEL - TPS]

Langue

Article de revue

Ce document a été publié dans

Physical Review E : Statistical, Nonlinear, and Soft Matter Physics. 2015-11-19, vol. 92, n° 5, p. 050903(R)

American Physical Society

Résumé en anglais

We report on experimental and theoretical studies of the fluctuation-induced escape time from a metastable state of a nanomechanical Duffing resonator in cryogenic environment. By tuning in situ the non-linear coefficient $\gamma$ we could explore a wide range of the parameter space around the bifurcation point, where the metastable state becomes unstable. We measured in a relaxation process the distribution of the escape times. We have been able to verify its exponential distribution and extract the escape rate $\Gamma$. We investigated the scaling of $\Gamma$ with respect to the distance to the bifurcation point and $\gamma$, finding an unprecedented quantitative agreement with the theoretical description of the stochastic problem. Simple power scaling laws turn out to hold in a large region of the parameter's space, as anticipated by recent theoretical predictions. These unique findings, implemented in a model dynamical system, are relevant to all systems experiencing under-damped saddle-node bifurcation.< Réduire

Mots clés en anglais

nano-mechanics

bifurcation

nonlinear phenomena

DOI

http://dx.doi.org/10.1103/PhysRevE.92.050903

Projet Européen

EUROPEAN MICROKELVIN COLLABORATION

Project ANR

Nano Mécanique Quantique - ANR-10-BLAN-0404

Origine

Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798