Noise-to-signal transition of a Brownian particle in the cubic potential: I. general theory

0464908 - ÚPT 2017 RIV GB eng J - Článek v odborném periodiku
Filip, R. - Zemánek, Pavel
Noise-to-signal transition of a Brownian particle in the cubic potential: I. general theory.
Journal of Optics. Roč. 18, č. 6 (2016), 065401:1-8. ISSN 2040-8978. E-ISSN 2040-8986
Grant CEP: GA ČR GB14-36681G
Institucionální podpora: RVO:68081731
Klíčová slova: optically trapped particles * Brownian motion * optomechanics
Kód oboru RIV: BH - Optika, masery a lasery
Impakt faktor: 1.741, rok: 2016

The noise-to-signal transitions are very interesting processes in physics, as they might transform environmental noise to useful mechanical effects. We theoretically analyze stochastic noise-to-signal transition of overdamped Brownian motion of a particle in the cubic potential. The particle reaches thermal equilibrium with its environment in the quadratic potential which is suddenly swapped to the cubic potential. We predict a simultaneous increase of both the displacement and signal-to-noise ratio in the cubic potential for the position linearly powered by the temperature of the particle environment. The short-time analysis and numerical simulations fully confirm different dynamical regimes of this noise-to-signal transition.
Trvalý link: http://hdl.handle.net/11104/0263653