Out-of-equilibrium Frenkel–Kontorova model
Out-of-equilibrium Frenkel–Kontorova model
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非平衡 Frenkel-Kontorova 模型
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
A. Imparato
中科院分区：
文献类型：
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作者：
A. Imparato
考虑了在周期性衬底上运动的相互作用粒子的一维模型和位置依赖的温度分布。当基板和温度分布在空间上是不对称的质心速度发展，对应于链的定向运输。因此，这个自主系统可以将健康电流转化为运动。可以调整模型参数，使得颗粒表现出从基板上的有序配置到无序配置的交叉，在这样的无序相中达到最大的电动机效应。在这种情况下，多体马达的性能优于单马达系统，显示了集体效应在微观热装置中的重要性。因此，这种集体效应代表了一种免费的资源，可以用来提高微观机器的动力学和热力学性能。
A 1D model of interacting particles moving over a periodic substrate and in a position dependent temperature profile is considered. When the substrate and the temperature profile are spatially asymmetric a centre-of-mass velocity develops, corresponding to a directed transport of the chain. This autonomous system can thus transform heath currents into motion. The model parameters can be tuned such that the particles exhibit a crossover from an ordered configuration on the substrate to a disordered one, the maximal motor effect being reached in such a disordered phase. In this case the manybody motor outperforms the single motor system, showing the great importance of collective effects in microscopic thermal devices. Such collective effects represent thus a free resource that can be exploited to enhance the dynamic and thermodynamic performances in microscopic machines.