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.

引用

页数：5