论文标题
通过混沌波动挑战的量子计算的Transmon平台
Transmon platform for quantum computing challenged by chaotic fluctuations
论文作者
论文摘要
从许多人体物理学的角度来看，当前用于量子计算的Transmon Qubit架构是耦合非线性量子谐振器的系统。需要大量的故意频率失调（无序）来保护单个量子态免受非线性谐振偶联的稳定效应。在这里，我们研究了与两种不同类型的当前量子处理器有关的系统参数的多体局部（MBL）相的稳定性，即使用不可降低的Qubits（IBM类型）和使用可调节量子器（DELFT/Google类型）的量子。应用三个独立的定位理论诊断：光谱统计数据的Kullback-Leibler分析，多体波函数的统计数据（逆参与率）以及多体频谱的WALSH变换 - 我们发现这些计算平台在无法控制的Chaotoic Chaotic波动的相位危险地接近了危险的相近。
From the perspective of many body physics, the transmon qubit architectures currently developed for quantum computing are systems of coupled nonlinear quantum resonators. A significant amount of intentional frequency detuning (disorder) is required to protect individual qubit states against the destabilizing effects of nonlinear resonator coupling. Here we investigate the stability of this variant of a many-body localized (MBL) phase for system parameters relevant to current quantum processors of two different types, those using untunable qubits (IBM type) and those using tunable qubits (Delft/Google type). Applying three independent diagnostics of localization theory -- a Kullback-Leibler analysis of spectral statistics, statistics of many-body wave functions (inverse participation ratios), and a Walsh transform of the many-body spectrum -- we find that these computing platforms are dangerously close to a phase of uncontrollable chaotic fluctuations.
