Elastically coupled two-dimensional Brownian motors

Title Elastically coupled two-dimensional Brownian motors

Transport properties and efficiency of elastically coupled Brownian motors.

As models for biological molecular motors, Brownian motors have been studied recently by many workers, and their physical properties such as velocity, efficiency, and so on, have been investigated. They have also attracted much interest in an application to nanoscale technology. It is significant to study more complex systems, that is, coupled Brownian motors, in detail, since Brownian motors w...

Elastically coupled molecular motors

We study the influence of filament elasticity on the motion of collective molecular motors. It is found that for a backbone flexibility exceeding a characteristic value (motor stiffness divided through the mean displacement between attached motors), the ability of motors to produce force reduces as compared to rigidly coupled motors, while the maximum velocity remains unchanged. The forceveloci...

Distinct transport regimes for two elastically coupled molecular motors.

Cooperative cargo transport by two molecular motors involves an elastic motor-motor coupling, which can reduce the motors' velocity and/or enhance their unbinding from the filament. We show theoretically that these interference effects lead, in general, to four distinct transport regimes. In addition to a weak coupling regime, kinesin and dynein motors are found to exhibit a strong coupling and...

Coupled Brownian Motors

Abs t rac t . A unifying view on several astonishing effects induced by state dependent, uncorrelated fluctuations (multipficative white noise) is presented. The main emphasis of our introductory discussion is put on the basic physical mechanisms at work in a white noise driven "pulsating ratchet", noise-induced non-equilibrium phase transitions, and their synthesis in the form of coupled Brown...