论文标题
高动能和低损耗量子设备的颗粒超导体
Granular superconductors for high kinetic inductance and low loss quantum devices
论文作者
论文摘要
颗粒铝是高动能设备（如Qubit电路）的有前途的材料。它比原子无序的材料（例如NBN_X）具有优势，可以与高质量的因子保持高动能。我们表明，具有正常状态电阻率值的高质量粒度颗粒铝膜，可以获得正常状态电阻率值的1x10^5μΩCM阶，并且可以获得10 nh/sq阶的动力学电感值，可以超过艺术价值状态。我们认为，这是金属对绝缘体转变的不同性质，是前者驱动的电子相关性（MOTT类型），而后者驱动（Anderson型）。
Granular aluminum is a promising material for high kinetic inductance devices such as qubit circuits. It has the advantage over atomically disordered materials such as NbN_x, to maintain a high kinetic inductance concomitantly with a high quality factor. We show that high quality nano-scale granular aluminum films having a sharp superconducting transition with normal state resistivity values of the order of 1x10^5 μΩcm and kinetic inductance values of the order of 10 nH/sq can be obtained, surpassing state of the art values. We argue that this is a result of the different nature of the metal-to-insulator transition, being electronic correlations driven (Mott type) in the former and disorder driven (Anderson type) in the latter.
