N端结的非线性热控制
Nonlinear thermal control in an N-terminal junction
摘要：
我们证明了在N-末端分子结的热流控制。使用简单的模型哈密顿，我们表明，通过两个终端的热电流可以调谐，切换，放大，外部门控水库的温度和耦合参数。我们讨论了两种模型：一个完全谐波系统，并将非谐波相互作用的模型。对于这两个模型的控制水库诱导分子振动状态之间的过渡元素的热波动。我们发现，完全谐波模型不显示任何可控性，而对于非谐波系统的结的导电性能强烈依赖于门的参数。在纳米器件和大分子的模型系统的实现进行了讨论。
英文摘要：
We demonstrate control over heat flow in an N-terminal molecular junction. Using simple model Hamiltonians we show that the heat current through two terminals can be tuned, switched, and amplified, by the temperature and coupling parameters of external gating reservoirs. We discuss two models: A fully harmonic system, and a model incorporating anharmonic interactions. For both models the control reservoirs induce thermal fluctuations of the transition elements between molecular vibrational states. We find that a fully harmonic model does not show any controllability, while for an anharmonic system the conduction properties of the junction strongly depend on the parameters of the gates. Realizations of the model system within nanodevices and macromolecules are discussed.
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