Berlin 2024 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 6: Statistical Physics far from Thermal Equilibrium I
DY 6.8: Vortrag
Montag, 18. März 2024, 11:45–12:00, BH-N 334
Powerful ordered collective heat engines — •Fernando Silva Filho1,2,3, Gustavo Forao1, Daniel Busiello4, Bart Cleuren3, and Carlos Fiore1 — 1University of São Paulo, Instituto de Física, Rua do Matão, 1371, 05508-090 São Paulo, SP, Brazil — 2Institute for Theoretical Physics IV, University of Stuttgart - 70569 Stuttgart, Germany — 3UHasselt, Faculty of Sciences, Theory Lab, Agoralaan, 3590 Diepenbeek, Belgium — 4Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany
In this talk, we present a recently published work (PhysRevResearch.5.043067) about a class of interacting heat engines in which the regime of units operating synchronously (in ordered phase) 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 ηC and the Curzon-Ahlborn bound ηCA. 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 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 far from equilibrium thermal engines based on ordered structures.
Keywords: Thermodynamics; engines; Ising; Efficiency; Curzon-Ahlborn