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Powerful ordered collective heat engines
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DOI：10.1103/PhysRevResearch.5.043067.png)
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摘要
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We introduce a class of stochastic engines in which the regime of units operating synchronously can boost the performance. Our approach encompasses a minimal setup composed of N interacting units placed in contact with two thermal baths and subjected to a constant driving worksource. The interplay between unit synchronization and interaction leads to an efficiency at maximum power between the Carnot eta(c) and the Curzon-Ahlborn bound eta(CA). Moreover, these limits can be respectively saturated maximizing the efficiency, and by simultaneous optimization of power and efficiency. We show that the interplay between Ising-like interactions and a collective ordered regime is crucial to operate as a heat engine. The main system features are investigated by means of a linear analysis near equilibrium, and developing an effective discrete-state model that captures the effects of the synchronous phase. The robustness of our findings extends beyond the all-to-all interactions and paves the way for the building of promising nonequilibrium thermal machines based on ordered structures.
Keyword:
FLUCTUATION THEOREM
EFFICIENCY
MECHANISM
MODEL
期刊
IF:
4.2
论文数:
7.6K
被引数:
2.7W
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