论文标题
通过非线性共振来保护量子位
Protection of qubits by nonlinear resonances
论文作者
论文摘要
我们表明，量化的超导电路在经典的描述层面是不可集成的，在随机海中，非线性共振装饰。这些准积分系统的光谱波动在规律性和混乱之间表现出中间行为。相邻间距的比率的分布函数以及最接近的纽布间距分布函数证明了发生“轻度混乱”的情况。基于这些功能，我们提出了保护量子器免受腐蚀性的标准，这相当于以系统驻留于相应古典系统的主要非线性共振的椭圆点的方式选择系统的参数。
We show that quantized superconducting circuits are non-integrable at the classical level of description, adorned by nonlinear resonances amidst stochastic sea. The spectral fluctuations of these quasi-integrable systems exhibit intermediate behaviour between regularity and chaos. The distribution function of ratios of adjacent spacings, and, nearest-neighbour spacing distribution functions attest to the occurrence of "mild chaos". Based on these features, we propose criteria for protection of qubits from decoherence which amounts to choosing the parameters of the system in a way that the system resides as close as possible to the elliptic point of the primary nonlinear resonance of the corresponding classical system.
