论文标题
腔介导的光学纳米孔子中的声子热传输
Phonon heat transport in cavity-mediated optomechanical nanoresonators
论文作者
论文摘要
对非平衡热力学中热传输的理解是重要的研究边界，这对于实施新型热力学设备（例如热发动机和冰箱）至关重要。对流，传导和辐射是传递热能的众所周知的基本方法。在这里，我们在两个空间分离的纳米力学谐振器之间证明了一种新的机制，该机制与空腔增强的远距离相互作用结合在一起。实时监测用于热化和非平衡动力学的单个轨迹。我们发现，在强耦合方案中，即时热通量在非平衡稳态中来回振荡，在热能传递过程中自发地上方的临界点上方。在这种温度梯度驱动的遥远平衡系统中，验证了非平衡稳态热通量的精确度，即热力学不确定性关系。我们的结果揭示了以前未观察到的现象，用于使用机械振荡器进行传热，并为测试非平衡热力学基本理论提供了操场。
The understanding of heat transport in nonequilibrium thermodynamics is an important research frontier, which is crucial for implementing novel thermodynamic devices, such as heat engines and refrigerators. The convection, conduction, and radiation are the well-known basic ways to transfer thermal energy. Here we demonstrate a new mechanism of phonon heat transport between two spatially separated nanomechanical resonators coupled by the cavity-enhanced long-range interactions. The single trajectory for thermalization and non-equilibrium dynamics is monitored in real-time. We find that, in the strong coupling regime, instant heat flux counterintuitively oscillates back and forth in nonequilibrium steady states, which occurs spontaneously above the critical point during the thermal energy transfer process. The universal bound on the precision of nonequilibrium steady-state heat flux, i.e. the thermodynamic uncertainty relation, is verified in such a temperature gradient driven far-off equilibrium system. Our results reveal a previously unobserved phenomenon for heat transfer with mechanical oscillators, and provide a playground for testing fundamental theories in non-equilibrium thermodynamics.
