论文标题
基于鱿鱼几何形状来表征和优化量子
Characterizing and optimizing qubit coherence based on SQUID geometry
论文作者
论文摘要
现代频率可调超导量子位中的破坏性的主要来源是1/$ f $通量噪声。为了了解其起源并找到最大程度地减少其影响的方法，我们系统地研究了50多个通量Qubits中的通量噪声幅度，具有不同的鱿鱼几何参数，并将我们的结果与位于周围接口的接口上的磁性自旋缺陷的显微镜模型进行了比较。我们的数据基于研究鱿鱼中电流分布的数值模拟，与先前提出的模型的扩展一致。我们的结果和详细模型提供了指南，以最大程度地降低未来电路中的通量噪声敏感性。
The dominant source of decoherence in contemporary frequency-tunable superconducting qubits is 1/$f$ flux noise. To understand its origin and find ways to minimize its impact, we systematically study flux noise amplitudes in more than 50 flux qubits with varied SQUID geometry parameters and compare our results to a microscopic model of magnetic spin defects located at the interfaces surrounding the SQUID loops. Our data are in agreement with an extension of the previously proposed model, based on numerical simulations of the current distribution in the investigated SQUIDs. Our results and detailed model provide a guide for minimizing the flux noise susceptibility in future circuits.
