Diagnosing quantum crosstalk in superconducting quantum chips by using out-of-time-order correlators

被引：0
作者：
Zhang, Yujia [1 ,2 ,3 ]
Zhang, Yu [1 ,2 ,3 ]
Li, Shaoxiong [1 ,2 ,3 ,4 ]
Zhang, Wen [1 ,2 ,3 ]
Yu, Yang [1 ,2 ,3 ,4 ]
机构：
[1] Nanjing Univ, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Shishan Lab, Suzhou Campus, Suzhou 215163, Peoples R China
[3] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum Ph, Hefei 230026, Peoples R China
[4] Hefei Natl Lab, Hefei 230088, Peoples R China
来源：
CHINESE PHYSICS B | 2024年 / 33卷 / 11期
基金：
中国国家自然科学基金;
关键词：
superconducting qubit; crosstalk; out-of-time-order correlator (OTOC); !text type='PYTHON']PYTHON[!/text] FRAMEWORK; DYNAMICS; QUTIP;
D O I：
10.1088/1674-1056/ad73b3
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Performance of a scalable quantum processor critically relies on minimizing crosstalk and unwanted interactions within the system, as it is vital for parallel controlled operations on qubits. We present a protocol not only to provide information about residual coupling but also to effectively discriminate it from the influence of classical crosstalk. Our approach utilizes out-of-time-order correlators (OTOCs) as a signal of quantum crosstalk, making it applicable to various coupling forms and scalable architectures. To demonstrate the effectiveness of our protocol, we provide a theoretical analysis and simulate its implementation in coupled superconducting qubits.
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页数：5
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