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arXiv 2102.13044quant-ph
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具有稳定器验证和门综合的随机基准测试

Randomized Benchmarking with Stabilizer Verification and Gate Synthesis

Ellen Derbyshire, Rawad Mezher, Theodoros Kapourniotis, Elham Kashefi

摘要:

最近,出现了噪声中间尺度量子(NISQ)设备的有用应用,特别是在量子机器学习和变分量子算法领域。在这样的应用中,各种深度的电路和组成的不同的门组上运行NISQ设备。因此,至关重要的是找到实用的方法来捕捉这些设备上的电路的一般性能。出于这种迫切的需要,我们修改了标准的克利福德随机基准测试(RB)和交错RB计划针对他们的硬件限制。首先,我们删除的要求,并假设,逆算子,在克利福德RB纳入技术从量子验证。这引入了另一个评估NISQ硬件质量的品质因数,即量子验证的接受概率。许多量子算法,提供了一个优势,超过经典算法,要求使用克利福德以及非克利福德门。因此,作为我们的第二个贡献,我们开发了一种技术,用于表征各种非克利福德门,通过门合成与交错RB相结合的工具。我们的技术是最相关的RB计划,基准发电机(或本地门)的Clifford组,并在低误差制度结合使用时。

英文摘要:

Recently, there has been an emergence of useful applications for noisy intermediate-scale quantum (NISQ) devices notably, though not exclusively, in the fields of quantum machine learning and variational quantum algorithms. In such applications, circuits of various depths and composed of different sets of gates are run on NISQ devices. Therefore, it is crucial to find practical ways to capture the general performance of circuits on these devices. Motivated by this pressing need, we modified the standard Clifford randomized benchmarking (RB) and interleaved RB schemes targeting them to hardware limitations. Firstly we remove the requirement for, and assumptions on, the inverse operator, in Clifford RB by incorporating a tehchnique from quantum verification. This introduces another figure of merit by which to assess the quality of the NISQ hardware, namely the acceptance probability of quantum verification. Many quantum algorithms, that provide an advantage over classical algorithms, demand the use of Clifford as well as non-Clifford gates. Therefore, as our second contribution we develop a technique for characterising a variety of non-Clifford gates, by combining tools from gate synthesis with interleaved RB. Both of our techniques are most relevant when used in conjunction with RB schemes that benchmark generators (or native gates) of the Clifford group, and in low error regimes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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