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

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外文摘要：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.

外文关键词：

superconducting qubitcrosstalkout-of-time-order correlator(OTOC)

作者：

张宇佳、张钰、李邵雄、郑文、于扬

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作者单位：

National Laboratory of Solid State Microstructures,School of Physics,Nanjing University,Nanjing 210093,China

Shishan Laboratory,Suzhou Campus of Nanjing University,Suzhou 215163,China

Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China

Hefei National Laboratory,Hefei 230088,China

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出版年：

2024

DOI：

10.1088/1674-1056/ad73b3

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

年,卷(期)：2024.33(11)