Coherent hydrodynamic coupling for stochastic swimmers
Department of Physics, Zanjan University - Zanjan 313, Iran
2 Department of Physics and Astronomy, University of Sheffield - Sheffield S3 7RH, UK, EU
Accepted: 11 June 2010
A recently developed theory of stochastic swimming is used to study the notion of coherence in active systems that couple via hydrodynamic interactions. It is shown that correlations between various modes of deformation in stochastic systems play the same role as the relative internal phase in deterministic systems. An example is presented where a simple swimmer can use these correlations to hunt a non-swimmer by forming a hydrodynamic bound state of tunable velocity and equilibrium separation. These results highlight the significance of coherence in the collective behavior of nano-scale stochastic swimmers.
PACS: 87.19.ru – Locomotion / 07.10.Cm – Micromechanical devices and systems / 82.39.-k – Chemical kinetics in biological systems
© EPLA, 2010