title: Efficiency at maximum power of motor traffic on networks.
abstract: We study motor traffic on Bethe networks subject to hard-core exclusion for both tightly coupled one-state machines and loosely coupled two-state machines that perform work against a constant load. In both cases we find an interaction-induced enhancement of the efficiency at maximum power (EMP) as compared to noninteracting motors. The EMP enhancement occurs for a wide range of network and single-motor parameters and is due to a change in the characteristic load-velocity relation caused by phase transitions in the system. Using a quantitative measure of the trade-off between the EMP enhancement and the corresponding loss in the maximum output power we identify parameter regimes where motor traffic systems operate efficiently at maximum power without a significant decrease in the maximum power output due to jamming effects.
authors.affiliation: Department of Physics and Astronomy, University of Aarhus, Ny Munkegade, Building 1520, DK-8000 Aarhus C, Denmark.
authors.forename: N
authors.initials: N
authors.lastname: Golubeva
authors.affiliation: Department of Physics and Astronomy, University of Aarhus, Ny Munkegade, Building 1520, DK-8000 Aarhus C, Denmark.
authors.forename: A
authors.initials: A
authors.lastname: Imparato
mesh_terms: D008954:Models, Biological; D020409:Molecular Motor Proteins / Q000378:metabolism*; D049329:Nanostructures / Q000737:chemistry; D044367:Phase Transition; D013816:Thermodynamics
chemical_list: D020409:Molecular Motor Proteins