标题： 直流驱动的约瑟夫森结阵列作为低温片上微波测量平台 显示英文标题

标题： DC-operated Josephson junction arrays as a cryogenic on-chip microwave measurement platform

摘要： 将射频（RF）信号提供给在低温条件下工作的电路需要笨重且昂贵的传输电缆，这些电缆连接着固定在室温下的专用RF电子设备。 超导约瑟夫森结阵列（JJAs）可以通过将RF源和探测器放在芯片内部来改变这种模式。 在本研究中，我们证明了直流偏置的JJAs可以在C波段频率范围及更高频率发出信号。 我们制造了可重复的JJAs，由非晶态MoGe或NbTiN超导岛和金属Au弱连接组成。 探索了温度、磁场、施加电流和器件设计以控制RF源的操作，同时我们还确定了影响理想源行为的重要特性。 结合这些JJAs检测微波辐射的已证实能力，这些源使我们能够提出一个完全直流操作的低温片上测量平台，这是目前用于几种量子应用的高频电路的一个可行替代方案。 显示英文摘要

摘要： Providing radio frequency (RF) signals to circuits working in cryogenic conditions requires bulky and expensive transmission cabling interfacing specialized RF electronics anchored at room temperature. Superconducting Josephson junction arrays (JJAs) can change this paradigm by placing the RF source and detector inside the chip. In this work, we demonstrate that DC-biased JJAs can emit signals in the C-band frequency spectrum and beyond. We fabricate reproducible JJAs comprised of amorphous MoGe or NbTiN superconducting islands and metallic Au weak links. Temperature, magnetic fields, applied currents, and device design are explored to control the operation of the RF sources, while we also identify important features that affect the ideal source behavior. Combined with the proven ability of these JJAs to detect microwave radiation, these sources allow us to propose a fully DC-operated cryogenic on-chip measurement platform that is a viable alternative to the high-frequency circuitry currently required for several quantum applications.