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 -