近日，新加坡国立大学的Jiangbin Gong及其研究团队取得一项新进展。经过不懈努力，他们实现了非绝热完整运算中系统振幅误差的减小。相关研究成果已于2024年7月9日在国际知名学术期刊《物理评论A》上发表。

在这项工作中，研究人员提出一种非绝热完整运算方案，以减轻系统振幅误差。这是通过引入监控量子比特以及作为纠错装置的监控量子比特上的条件测量来实现的。他们将展示如何滤除系统振幅误差的不良影响，从而提高非绝热完整运算的性能。

据悉，非绝热完整运算基于非绝热非阿贝尔几何相位，因此具有对控制误差表现出鲁棒性的固有几何特征。然而，非绝热完整运算仍然对脉冲时间，或激光强度控制不完善引起的系统振幅误差敏感。

附：英文原文

Title: Mitigation of systematic amplitude error in nonadiabatic holonomic operations

Author: P. Z. Zhao, Jiangbin Gong

Issue&Volume: 2024/07/09

Abstract: Nonadiabatic holonomic operations are based on nonadiabatic non-Abelian geometric phases, hence possessing the inherent geometric features for robustness against control errors. However, nonadiabatic holonomic operations are still sensitive to the systematic amplitude error induced by imperfect control of pulse timing or laser intensity. In this work, we present a scheme of nonadiabatic holonomic operations in order to mitigate the said systematic amplitude error. This is achieved by introducing a monitor qubit along with a conditional measurement on the monitor qubit that serves as an error correction device. We shall show how to filter out the undesired effect of the systematic amplitude error, thereby improving the performance of nonadiabatic holonomic operations.

DOI: 10.1103/PhysRevA.110.012426

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.012426