论文标题
与本地和非本地互动的纳米力学系统中的热传输和冷却性能
Heat transport and cooling performance in a nanomechanical system with local and non local interactions
论文作者
论文摘要
在目前的工作中，我们通过一个维度依赖性的纳米力学系统研究热传输。显微镜模型由原子的耦合链组成，考虑到粒子之间的局部和非本地相互作用。我们表明，该系统根据驾驶频率，温度梯度和相互作用的位置程度提出了不同的固定运输方式。在其中一个制度中，该系统作为声子冰箱运行，并分析其冷却性能。基于低频方法，我们表明非本地性及其与耗散的相互作用会导致冷却能力下降。结果是通过Keldysh非平衡绿色功能形式主义获得的。
In the present work, we study heat transport through a one dimensional time-dependent nanomechanical system. The microscopic model consists of coupled chains of atoms, considering local and non-local interactions between particles. We show that the system presents different stationary transport regimes depending on the driving frequency, temperature gradients and the degree of locality of the interactions. In one of these regimes, the system operates as a phonon refrigerator, and its cooling performance is analyzed. Based on a low frequency approach, we show that non-locality and its interplay with dissipation cause a decrease in cooling capacity. The results are obtained numerically by means of the Keldysh non-equilibrium Green's function formalism.
