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arXiv 2205.09288quant-ph
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基于路径优化的非绝热完整量子计算

Nonadiabatic Holonomic Quantum Computation via Path Optimization

Li-Na Ji, Yan Liang, Pu Shen, Zheng-Yuan Xue

摘要:

非绝热完整量子计算(NHQC)是通过快速演化过程以几何方式实现的,以抵抗局域噪声。然而,目前实施NHQC的工作对系统噪声和误差很敏感。本文提出了一种基于非阿贝尔几何相位的路径优化NHQC(PONHQC)方案,发现不同的演化路径可以构造出对系统噪声有不同响应的几何门。由于PONHQC方案的灵活性,我们可以选择一个优化的路径,可以导致出色的门性能。数值模拟表明,我们的优化方案可以大大优于传统的NHQC方案,在保真度和门的鲁棒性。此外,我们提出了在超导量子线路上实现我们的策略与消相干的子空间编码与实验友好的两体交换相互作用。因此,我们提出了一个灵活的NHQC方案,这是有前途的未来强大的量子计算。

英文摘要:

Nonadiabatic holonomic quantum computation (NHQC) is implemented by fast evolution processes in a geometric way to withstand local noises. However, recent works of implementing NHQC are sensitive to the systematic noise and error. Here, we present a path-optimized NHQC (PONHQC) scheme based on the non-Abelian geometric phase, and find that a geometric gate can be constructed by different evolution paths, which have different responses to systematic noises. Due to the flexibility of the PONHQC scheme, we can choose an optimized path that can lead to excellent gate performance. Numerical simulation shows that our optimized scheme can greatly outperform the conventional NHQC scheme, in terms of both fidelity and robustness of the gates. In addition, we propose to implement our strategy on superconducting quantum circuits with decoherence-free subspace encoding with the experiment-friendly two-body exchange interaction. Therefore, we present a flexible NHQC scheme that is promising for the future robust quantum computation.

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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