论文标题
超导颗粒铝谐振器具有弹性的磁场，最多1特斯拉
Superconducting granular aluminum resonators resilient to magnetic fields up to 1 Tesla
论文作者
论文摘要
高动感材料构成了超导量子电路和混合体系结构的宝贵资源。超导颗粒铝（GRAL）在NH/$ \ Square $范围内达到动力板电感，并在超导量子位和微波检测器中得到了证明适用。在这里，我们表明，Gral微波谐波谐振器的单个光子内部质量因子$ Q _ {\ Mathrm {i}} $超过$ 10^5 $的磁场，最多为1T，与Gral膜保持一致。在0.5mt范围内，小的垂直磁场增强了$ q _ {\ mathrm {i}} $的大约15％，这可能是由于Fluxons形式引入了Quasiparticle陷阱。进一步增加垂直场会恶化谐振器的质量因子。这些结果为在具有磁场需求的电路量子电动力学和混合体系结构中使用高动能GRAL结构打开了大门。
High kinetic inductance materials constitute a valuable resource for superconducting quantum circuits and hybrid architectures. Superconducting granular aluminum (grAl) reaches kinetic sheet inductances in the nH/$\square$ range, with proven applicability in superconducting quantum bits and microwave detectors. Here we show that the single photon internal quality factor $Q_{\mathrm{i}}$ of grAl microwave resonators exceeds $10^5$ in magnetic fields up to 1T, aligned in-plane to the grAl films. Small perpendicular magnetic fields, in the range of 0.5mT, enhance $Q_{\mathrm{i}}$ by approximately 15%, possibly due to the introduction of quasiparticle traps in the form of fluxons. Further increasing the perpendicular field deteriorates the resonators' quality factor. These results open the door for the use of high kinetic inductance grAl structures in circuit quantum electrodynamics and hybrid architectures with magnetic field requirements.
