论文标题
级联超导连接冰箱：优化和性能限制
Cascaded superconducting junction refrigerators: optimization and performance limits
论文作者
论文摘要
我们展示了高透明的硅葡萄酒和硅 - 铝隧道连接，具有相对较低的亚漏水电流，并讨论透明度和泄漏之间通常遇到的权衡会影响其制冷性能。我们从理论上研究了两个或两个以上的制冷阶段的级联超导隧道连接冰箱。特别是，我们开发了一种近似方法，该方法考虑了自加热效果，但仍然可以一次优化级联一个阶段。我们设计了一个由节能制冷阶段组成的级联，该阶段使得量子设备从1 k到100 mk以上的量子设备进行冷却，这是一个现实的实验目标。
We demonstrate highly transparent silicon-vanadium and silicon-aluminum tunnel junctions with relatively low sub-gap leakage current and discuss how a trade-off typically encountered between transparency and leakage affects their refrigeration performance. We theoretically investigate cascaded superconducting tunnel junction refrigerators with two or more refrigeration stages. In particular, we develop an approximate method that takes into account self-heating effects but still allows us to optimize the cascade a single stage at a time. We design a cascade consisting of energy-efficient refrigeration stages, which makes cooling of, e.g., quantum devices from above 1 K to below 100 mK a realistic experimental target.
