TY - JOUR

T1 - Tuning active Brownian motion with shot noise energy pulses

AU - Fiasconaro, Alessandro

AU - Gudowska-Nowak, Ewa

AU - Ebeling, Werner

AU - Fiasconaro, Alessandro

PY - 2009

Y1 - 2009

N2 - The main aim of this work is to explore the possibility of modelingthe biological energy support mediated by absorption of ATP (adenosinetriphosphate) as an energetic shot noise. We develop a general model withdiscrete input of energy pulses and study shot-noise-driven ratchets. We considerthese ratchets as prototypes of Brownian motors driven by energy-rich ATPmolecules. Our model is a stochastic machine able to acquire energy fromthe environment and convert it into kinetic energy of motion. We presentcharacteristic features and demonstrate the possibility of tuning these motors byadapting the mean frequency of the discrete energy inputs, which are described asa special shot noise. In particular, the effect of stochastically driven directionalityand uphill flux in systems acquiring energy from the shot noise is analyzed. Asa possible application we consider the motion of kinesin on a microtubule undera constant load force.

AB - The main aim of this work is to explore the possibility of modelingthe biological energy support mediated by absorption of ATP (adenosinetriphosphate) as an energetic shot noise. We develop a general model withdiscrete input of energy pulses and study shot-noise-driven ratchets. We considerthese ratchets as prototypes of Brownian motors driven by energy-rich ATPmolecules. Our model is a stochastic machine able to acquire energy fromthe environment and convert it into kinetic energy of motion. We presentcharacteristic features and demonstrate the possibility of tuning these motors byadapting the mean frequency of the discrete energy inputs, which are described asa special shot noise. In particular, the effect of stochastically driven directionalityand uphill flux in systems acquiring energy from the shot noise is analyzed. Asa possible application we consider the motion of kinesin on a microtubule undera constant load force.

KW - BRonian motion

KW - Fluctuation phenomena

KW - driven diffusive systems (theory)

KW - molecular dynamics

KW - molecular motors (theory)

KW - stochastic particle dynamics
(theory)

KW - BRonian motion

KW - Fluctuation phenomena

KW - driven diffusive systems (theory)

KW - molecular dynamics

KW - molecular motors (theory)

KW - stochastic particle dynamics
(theory)

UR - http://hdl.handle.net/10447/46761

M3 - Article

VL - P01029

JO - Journal of Statistical Mechanics: Theory and Experiment

JF - Journal of Statistical Mechanics: Theory and Experiment

SN - 1742-5468

ER -