AI 中文总结
研究可编程量子结中熵传输，通过比较单、双量子比特结，发现双量子比特结增强熵传输且驱动功率低，还揭示共振驱动相干贡献及负微分熵电导等非直观效应，确定量子逻辑架构为可编程熵传输设备并指明相关方向。
AI 中文摘要
我们表明，驱动量子比特结能够对物理熵传输进行可编程控制，其熵电导由量子动力学而非仅由储能器参数决定。通过比较两种简单的量子架构——驱动单量子比特结和驱动双量子比特结，我们发现双量子比特结增强了熵传输，同时所需驱动功率远低于单量子比特结。我们还在这两种结中揭示了两个非直观效应：仅在共振驱动下出现的对熵流的可观相干贡献，以及负微分熵电导，即增加热偏置会抑制进入探测储能器的熵流。这些结果将量子逻辑架构确定为用于熵传输的可编程设备，并为驱动量子电路中的量子反馈控制、储能器保护和制冷指明了方向。
英文摘要
We show that driven qubit junctions enable programmable control of physical entropy transport, with entropy conductance governed by quantum dynamics rather than by reservoir parameters alone. By comparing two simple quantum architectures -- a driven single-qubit junction and a driven two-qubit junction -- we find that the two-qubit junction enhances entropy transfer while requiring substantially lower driving power than its single-qubit counterpart. We further reveal two non-intuitive effects in both junctions: a sizable coherent contribution to the entropy current that emerges only under resonant driving, and negative differential entropy conductance, where increasing the thermal bias suppresses entropy flow into the probe reservoir. These results identify quantum logic architectures as programmable devices for entropy transport and suggest routes toward quantum feedback control, reservoir protection and refrigeration in driven quantum circuits.
Comments15 pages, 8 figures
