The European Physical Journal Special Topics

, Volume 223, Issue 14, pp 3295–3309 | Cite as

Working under confinement

  • P. Malgaretti
  • I. Pagonabarraga
  • J.M. Rubi
Part of the following topical collections:
  1. Brownian Motion in Confined Geometries. Guest Editors: S.M. Bezrukov, L. Schimansky-Geier and G. Schmid (Eds.)


We analyze the performance of a Brownian ratchet in the presence of geometrical constraints. A two-state model that describes the kinetics of molecular motors is used to characterize the energetic cost when the motor proceeds under confinement, in the presence of an external force. We show that the presence of geometrical constraints has a strong effect on the performance of the motor. In particular, we show that it is possible to enhance the ratchet performance by a proper tuning of the parameters characterizing the environment. These results open the possibility of engineering entropically-optimized transport devices.


Phase Shift External Force European Physical Journal Special Topic Geometrical Constraint Processive Motor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© EDP Sciences and Springer 2014

Authors and Affiliations

  1. 1.Institut für Intelligente SystemeStuttgartGermany
  2. 2.IV. Institut für Theoretische PhysikUniversität StuttgartStuttgartGermany
  3. 3.Departament de Fisica FonamentalUniversitat de BarcelonaBarcelonaSpain

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