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- W3106403730 abstract "Information-driven engines that rectify thermal fluctuations are a modern realization of the Maxwell-demon thought experiment. We introduce a simple design based on a heavy colloidal particle, held by an optical trap and immersed in water. Using a carefully designed feedback loop, our experimental realization of an information ratchet takes advantage of favorable up fluctuations to lift a weight against gravity, storing potential energy without doing external work. By optimizing the ratchet design for performance via a simple theory, we find that the rate of work storage and velocity of directed motion is limited only by the physical parameters of the engine: the size of the particle, stiffness of the ratchet spring, friction produced by the motion, and temperature of the surrounding medium. Notably, because performance saturates with increasing frequency of observations, the measurement process is not a limiting factor. The extracted power and velocity are at least an order of magnitude higher than in previously reported engines." @default.
- W3106403730 created "2020-11-23" @default.
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- W3106403730 date "2021-05-10" @default.
- W3106403730 modified "2023-10-10" @default.
- W3106403730 title "Maximizing power and velocity of an information engine" @default.
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- W3106403730 doi "https://doi.org/10.1073/pnas.2023356118" @default.
- W3106403730 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8157929" @default.
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- W3106403730 hasPublicationYear "2021" @default.
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