Thermodynamic Geometry of Microscopic Heat Engines

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2020-01-29
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Language
en
Pages
7
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Physical Review Letters, Volume 124, issue 4
Abstract
We develop a general framework to describe the thermodynamics of microscopic heat engines driven by arbitrary periodic temperature variations and modulations of a mechanical control parameter. Within the slow-driving regime, our approach leads to a universal trade-off relation between efficiency and power, which follows solely from geometric arguments and holds for any thermodynamically consistent microdynamics. Focusing on Lindblad dynamics, we derive a second bound showing that coherence as a genuine quantum effect inevitably reduces the performance of slow engine cycles regardless of the driving amplitudes. To show how our theory can be applied in practice, we work out a specific example, which lies within the range of current solid-state technologies.
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Brandner, K & Saito, K 2020, ' Thermodynamic Geometry of Microscopic Heat Engines ', Physical Review Letters, vol. 124, no. 4, 040602 . https://doi.org/10.1103/PhysRevLett.124.040602