Average negative heat in a non-Markovian bath

Felix Ginot; Clemens Bechinger

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arXiv · 2311.16324

Average negative heat in a non-Markovian bath

Felix Ginot·Clemens Bechinger

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Abstract

We experimentally study the motion of a colloidal particle, translated back and forth within a viscoelastic, i.e. non-Markovian bath. The particle starts in equilibrium before the forward motion, but only partially relaxes at the turning point. During the backward motion, we measure a systematic (negative) heat flow from the bath to the particle. Our observations are in good agreement with a simple model that describes the time-delayed response of the fluid. We expect our results to be important for the realization and optimization of novel types of micro-engines in non-Markovian surroundings.

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Felix Ginot, Clemens Bechinger. 2023-11-27. Average negative heat in a non-Markovian bath. https://arxiv.org/abs/2311.16324

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