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通过通道频谱进行基准测试通用量子门

Yanwu Gu^1,2, Wei-Feng Zhuang³, Xudan Chai^3,4

¹Beijing Academy of Quantum Information Sciences, Beijing, 100193, China. guyw@baqis.ac.cn.

Nature communications

|September 21, 2023

概括

频道频谱基准测试 (CSB) 提供了一种可扩展的方法,可以精确地描述量子门噪声. 这种技术克服了当前方法的局限性,通过分析噪音道固有值来准确的量子处理器校准.

科学领域:

量子信息科学量子信息科学
量子计算是一种量子计算.
量子错误的表征量子错误的表征

背景情况:

噪音是实现可扩展量子计算的主要障碍.
量子基准测试对于理解噪声和推动量子处理器开发至关重要.
现有的基准测试技术往往缺乏针对单个门的具体性或通用适用性.

研究的目的:

引入频道频谱基准测试 (CSB) 作为推断量子门噪声特性的一种新方法.
解决当前量子基准分析方法的局限性,特别是关于门特异性和可扩展性.
为了实现单个门和电路片段的直接噪声表征,以提高量子处理器性能.

主要方法:

CSB从目标门杂量子通道的固有值推断出噪声特征,包括过程和随机忠实性.
该方法被设计为对状态准备和测量错误不敏感.
CSB适用于通用量子门,并可扩展到多量子位系统.

主要成果:

CSB为目标本地门和电路碎片提供直接噪声信息.
该技术允许对全球纠门进行基准测试和校准.
CSB促进了基本量子算法模块的表征,例如Trotterized Hamiltonian进化运算符.

结论:

频道频谱基准测试在量子噪声表征方面取得了重大进展.
CSB能够对通用门进行基准测试,并扩展到许多量子比特系统,这使得它对未来的量子处理器至关重要.
这种方法为校准复杂的量子运算和算法组件提供了直接和强大的方法.

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