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- W3100612792 abstract "Within the context of the Brownian ratchet model, a molecular rotary system that can perform unidirectional rotations induced by linearly polarized ac fields and produce positive work under loads was studied. The model is based on the Langevin equation for a particle in a two-dimensional (2D) three-tooth ratchet potential of threefold symmetry. The performance of the system is characterized by the coercive torque, i.e., the strength of the load competing with the torque induced by the ac driving field, and the energy efficiency in force conversion from the driving field to the torque. We propose a master equation for coarse-grained states, which takes into account the boundary motion between states, and develop a kinetic description to estimate the mean angular momentum (MAM) and powers relevant to the energy balance equation. The framework of analysis incorporates several 2D characteristics and is applicable to a wide class of models of smooth 2D ratchet potential. We confirm that the obtained expressions for MAM, power, and efficiency of the model can enable us to predict qualitative behaviors. We also discuss the usefulness of the torque/power relationship for experimental analyses, and propose a characteristic for 2D ratchet systems." @default.
- W3100612792 created "2020-11-23" @default.
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- W3100612792 date "2015-04-15" @default.
- W3100612792 modified "2023-09-27" @default.
- W3100612792 title "Performance Estimation for Two-Dimensional Brownian Rotary Ratchet Systems" @default.
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- W3100612792 doi "https://doi.org/10.7566/jpsj.84.044004" @default.
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