Zobrazeno 1 - 10
of 331
pro vyhledávání: '"Reguera D"'
Publikováno v:
Phys. Rev. Lett. 111, 168301 (2013)
Catalytic engines can use hydrogen peroxide as a chemical fuel in order to drive motion at the microscale. The chemo-mechanical actuation is a complex mechanism based on the interrelation between catalytic reactions and electro-hydrodynamics phenomen
Externí odkaz:
http://arxiv.org/abs/1311.3052
Publikováno v:
Phys. Rev. Lett. 108, 020604 (2012)
We present a particle separation mechanism which induces motion of particles of different sizes in opposite directions. The mechanism is based on the combined action of a driving force and an entropic rectification of the Brownian fluctuations caused
Externí odkaz:
http://arxiv.org/abs/1112.0874
Publikováno v:
Europhys. Lett. 87, 50003 (2009)
We demonstrate the appearance of a purely entropic stochastic resonance (ESR) occurring in a geometrically confined system, where the irregular boundaries cause entropic barriers. The interplay between a periodic input signal, a constant bias and int
Externí odkaz:
http://arxiv.org/abs/0908.3423
Publikováno v:
Euro. Phys. J. B 69, 11 (2009)
We demonstrate the existence of stochastic resonance (SR) in confined systems arising from entropy variations associated to the presence of irregular boundaries. When the motion of a Brownian particle is constrained to a region with uneven boundaries
Externí odkaz:
http://arxiv.org/abs/0902.4335
Publikováno v:
Phys. Rev. Lett. 101, 130602 (2008)
We present a novel scheme for the appearance of Stochastic Resonance when the dynamics of a Brownian particle takes place in a confined medium. The presence of uneven boundaries, giving rise to an entropic contribution to the potential, may upon appl
Externí odkaz:
http://arxiv.org/abs/0807.2558
Publikováno v:
Biosystems 93, 16-22(2008)
The dynamics of Brownian motion has widespread applications extending from transport in designed micro-channels up to its prominent role for inducing transport in molecular motors and Brownian motors. Here, Brownian transport is studied in micro-size
Externí odkaz:
http://arxiv.org/abs/0804.3681
Publikováno v:
Phys. Rev. E 75, 051111 (2007)
We study biased, diffusive transport of Brownian particles through narrow, spatially periodic structures in which the motion is constrained in lateral directions. The problem is analyzed under the perspective of the Fick-Jacobs equation which account
Externí odkaz:
http://arxiv.org/abs/cond-mat/0703701
We show that transport in the presence of entropic barriers exhibits peculiar characteristics which makes it distinctly different from that occurring through energy barriers. The constrained dynamics yields a scaling regime for the particle current a
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603608
Publikováno v:
J. Phys. Chem. B 2005, 109, 21502-21515
Concepts of everyday use like energy, heat, and temperature have acquired a precise meaning after the development of thermodynamics. Thermodynamics provides the basis for understanding how heat and work are related and with the general rules that the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511651
We show the existence of intermittent dynamics in one of the simplest model of a glassy system: the two-state model, which has been used to explain the origin of the violation of the fluctuation-dissipation theorem. The dynamics is analyzed through a
Externí odkaz:
http://arxiv.org/abs/cond-mat/0411063