Calorimetry for active systems

We provide the theoretical basis of calorimetry for a class of active particles subject to thermal noise. Simulating AC-calorimetry, we numerically evaluate the heat capacity of run-and-tumble particles in double-well and in periodic potentials, and of systems with a flashing potential. Low-temperat...

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Bibliographic Details
Published inSciPost physics Vol. 14; no. 5; p. 126
Main Authors Dolai, Pritha, Maes, Christian, Netočný, Karel
Format Journal Article
LanguageEnglish
Published SciPost 01.05.2023
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Summary:We provide the theoretical basis of calorimetry for a class of active particles subject to thermal noise. Simulating AC-calorimetry, we numerically evaluate the heat capacity of run-and-tumble particles in double-well and in periodic potentials, and of systems with a flashing potential. Low-temperature Schottky-like peaks show the role of activity and indicate shape transitions, while regimes of negative heat capacity appear at higher propulsion speeds. From there, a significant increase in heat capacities of active systems may be inferred at low temperatures, as well as the possibility of diagnostic tools for the activity of self-motile artificial or biomimetic systems based on heat capacity measurements.
ISSN:2542-4653
2542-4653
DOI:10.21468/SciPostPhys.14.5.126