Pseudo twirling mitigation of coherent errors in non-Clifford gates

IF 6.6 1区 物理与天体物理 Q1 PHYSICS, APPLIED
Jader P. Santos, Ben Bar, Raam Uzdin
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引用次数: 0

Abstract

The conventional circuit paradigm, utilizing a small set of gates to construct arbitrary quantum circuits, is hindered by significant noise. In the quantum Fourier transform, for instance, the standard gate paradigm employs two CNOT gates for the partial CPhase. In contrast, some quantum computers can directly implement such operations using their native interaction, resulting in less noisy gates. Unfortunately, coherent errors degrade the performance of these gates. In Clifford gates such as the CNOT, these errors can be addressed through randomized compiling (RC). However, RC does not apply to the non-Clifford multi-qubit native implementations described above. The present work introduces and experimentally demonstrates a technique called ‘Pseudo Twirling’ (PST) to address coherent errors. We demonstrate experimentally that integrating PST with the ‘Adaptive KIK’ quantum error mitigation method enables the simultaneous mitigation of noise and coherent errors in multi-qubit non-Clifford gates.

Abstract Image

非克里福德门中相干误差的伪旋转缓解
传统的电路范式利用一组小门来构建任意量子电路,但受到严重噪声的阻碍。例如,在量子傅立叶变换中,标准门范式为部分 CPhase 使用了两个 CNOT 门。相比之下,一些量子计算机可以直接使用它们的本机交互来实现此类操作,从而减少了门电路的噪声。不幸的是,相干误差会降低这些门的性能。在克利福德门(如 CNOT)中,这些误差可以通过随机编译(RC)来解决。然而,RC 并不适用于上述非克利福德多量子比特本机实现。本研究介绍并实验演示了一种名为 "伪旋转"(Pseudo Twirling,PST)的技术来解决相干错误。我们通过实验证明,将 PST 与 "自适应 KIK "量子误差缓解方法相结合,可以同时缓解多量子比特非克里福门中的噪声和相干误差。
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来源期刊
npj Quantum Information
npj Quantum Information Computer Science-Computer Science (miscellaneous)
CiteScore
13.70
自引率
3.90%
发文量
130
审稿时长
29 weeks
期刊介绍: The scope of npj Quantum Information spans across all relevant disciplines, fields, approaches and levels and so considers outstanding work ranging from fundamental research to applications and technologies.
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