Noise-resilient edge modes on a chain of superconducting qubits
Noise-resilient edge modes on a chain of superconducting qubits
复制标题
DOI：
10.1126/science.abq5769
复制
发表时间：
2022-11-18
期刊：
影响因子：
56.9
通讯作者：
Roushan, P.
中科院分区：
文献类型：
--
作者：
Mi, X.;Sonner, M.;Roushan, P.
量子系统的固有对称性可以保护其脆弱的状态。利用这种保护需要测试其对不受控制的环境相互作用的鲁棒性。利用47个超导量子比特，我们实现了具有Z（2）宇称对称性的非定域Majorana边缘模的一维反冲伊辛模型.我们发现，任何多量子位泡利运营商重叠的MEMS表现出一致的后期衰减率可比单量子位弛豫率，无论其大小或组成。这一特性使我们能够准确地重建指数局部空间分布的MEMS。此外，MEMs被发现是弹性的，对一定的破坏噪音，由于预热化机制。我们的工作阐明了在固态环境中的噪声和受保护的边缘模式之间复杂的相互作用。
Inherent symmetry of a quantum system may protect its otherwise fragile states. Leveraging such protection requires testing its robustness against uncontrolled environmental interactions. Using 47 superconducting qubits, we implement the one-dimensional kicked Ising model, which exhibits nonlocal Majorana edge modes (MEMs) with Z(2) parity symmetry. We find that any multiqubit Pauli operator overlapping with the MEMs exhibits a uniform late-time decay rate comparable to single-qubit relaxation rates, irrespective of its size or composition. This characteristic allows us to accurately reconstruct the exponentially localized spatial profiles of the MEMs. Furthermore, the MEMs are found to be resilient against certain symmetry-breaking noise owing to a prethermalization mechanism. Our work elucidates the complex interplay between noise and symmetry-protected edge modes in a solid-state environment.