Mar 26 – 28, 2014
Nordita, Stockholm
Europe/Stockholm timezone

Efficiency at maximum power of interacting biological and artificial nanomachines

Mar 27, 2014, 11:00 AM
45m
132:028 (Nordita, Stockholm)

132:028

Nordita, Stockholm

Speaker

Natalia Golubeva (Aarhus University)

Description

We investigate the efficiency at maximum power (EMP) of systems of autonomous molecular machines operating under constant load and interacting through hard-core exclusion. For biological machines we show in the case of kinesin motors moving on a single filament that mutual interactions enhance the EMP, as compared to the non-interacting case, due to a change in the characteristic response of the system to external load [1-2]. Remarkably, the EMP enhancement occurs in a limited region of the system parameter space, compatible with the biologically relevant range. By considering exclusion processes on networks for generic tightly and loosely coupled motors we show that interaction induced EMP enhancement can also be observed for more general cooperative systems [3]. Furthermore, we identify parameter regimes for which the loss in the maximum output power due to exclusion is compensated by the corresponding EMP boost, thereby providing design strategies for efficient artificial nanomotors operating at maximum power. [1] N. Golubeva and A. Imparato, Phys.Rev.Lett 109, 190692 (2012) [2] N. Golubeva and A. Imparato, Phys.Rev.E 88, 012114 (2013) [3] N. Golubeva and A. Imparato, arXiv:1402.0713

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