Tuning active Brownian motion with shot noise energy pulses

Alessandro Fiasconaro, Ewa Gudowska-Nowak, Werner Ebeling, Alessandro Fiasconaro

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    11 Citazioni (Scopus)

    Abstract

    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.
    Lingua originaleEnglish
    Numero di pagine14
    RivistaJournal of Statistical Mechanics: Theory and Experiment
    VolumeP01029
    Stato di pubblicazionePublished - 2009

    All Science Journal Classification (ASJC) codes

    • Statistical and Nonlinear Physics
    • Statistics and Probability
    • Statistics, Probability and Uncertainty

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