AI 中文总结
该研究提出基于谢尔宾斯基垫片Aharonov-Bohm干涉仪的三端热放大器，利用工程耗散与量子干涉的相互作用实现磁通量控制的巨热放大，为介观导体热流控制提供新机制。
AI 中文摘要
我们提出一种基于谢尔宾斯基垫片 Aharonov-Bohm 干涉仪的三端热放大器，其中第三端（基极）作为浮动的Buttiker探针，充当工程耗散库，与导体交换能量但不携带净电荷电流。利用非平衡格林函数形式，我们证明量子相干性与工程耗散的相互作用会产生由磁通量控制的巨热放大，而纯相干输运几乎无放大。我们表明，放大源于通量诱导的基极端能量分辨热响应的抵消，使其差分热电流消失，而发射极和集电极端仍有有限热电流流动。因此，热增益无需共振传输即可发散。这种干涉驱动的抵消产生了一种新的热透明性，与光学系统中的电磁诱导透明极为相似，其中相消量子干涉抑制基极库的热响应，同时保持其余端的有限热输运。我们的结果确立了工程耗散与量子干涉的相互作用作为控制热流、在介观导体中实现高性能热放大器的强大机制。
英文摘要
We propose a three-terminal thermal amplifier based on a Sierpinski-gasket Aharonov-Bohm interferometer, where the third (base) terminal is realized as a floating Buttiker probe that acts as an engineered dissipative reservoir, exchanging energy with the conductor while carrying no net charge current. Using the nonequilibrium Green's function formalism, we demonstrate that the interplay of quantum coherence and engineered dissipation gives rise to giant, magnetic-flux-controlled thermal amplification, whereas purely coherent transport exhibits little or no amplification. We show that the amplification originates from a flux-induced cancellation of the energy-resolved thermal response of the base terminal, causing its differential heat current to vanish while finite heat currents continue to flow through the emitter and collector terminals. As a result, the thermal gain diverges without requiring resonant transmission. This interference-driven cancellation gives rise to an emergent thermal transparency, closely analogous to electromagnetically induced transparency in optical systems, where destructive quantum interference suppresses the thermal response of the base reservoir while maintaining finite heat transport through the remaining terminals. Our results establish the interplay of engineered dissipation and quantum interference as a powerful mechanism for controlling heat flow and realizing high-performance thermal amplifiers in mesoscopic conductors.
