论文标题
将超导量子处理器从量子衰减和伽马和宇宙射线产生的相关误差中节省
Saving superconducting quantum processors from qubit decay and correlated errors generated by gamma and cosmic rays
论文作者
论文摘要
错误校正的量子计算机只有在较小且不相关的情况下才能起作用。在这里，我展示了宇宙射线或流浪背景辐射如何通过将声子建模到电子/Quasiparticle下转化物理学来影响超导Qubit。对于目前的设计，该模型可以预测约57％的辐射能将Cooper对库珀对列入准颗粒，然后在大面积（CM）上剧烈抑制量子能量放松时间（$ T_1 \ sim $ 160 ns），并长时间（MS）（MS）。如此大且相关的衰减会杀死错误校正。使用此定量模型，我展示了如何将这种能量从量子管中传递出来，从而可以通过许多数量级来降低此误差机制。我还评论这如何影响其他固态Qubit。
Error-corrected quantum computers can only work if errors are small and uncorrelated. Here I show how cosmic rays or stray background radiation affects superconducting qubits by modeling the phonon to electron/quasiparticle down-conversion physics. For present designs, the model predicts about 57\% of the radiation energy breaks Cooper pairs into quasiparticles, which then vigorously suppress the qubit energy relaxation time ($T_1 \sim$ 160 ns) over a large area (cm) and for a long time (ms). Such large and correlated decay kills error correction. Using this quantitative model, I show how this energy can be channeled away from the qubit so that this error mechanism can be reduced by many orders of magnitude. I also comment on how this affects other solid-state qubits.
