Force-free motion in an asymmetric environment: a simple model for structured objects
نویسنده
چکیده
Recent models have shown how dissipation of energy can set into directed motion a point-like particle in an environment of vectorial symmetry, even in the absence of macroscopic forces. This statement is extended to the case of an object with an internai structure, focusing on the simplest model: an elastic dumb-bell. We briefly show that specific mechanisms then come into play, able to set the object into directed motion even ifthermal diffusion is neghgible.
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