使用统一控制的任意双量子比特门的有效实现

IF 18.4 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY
Zhen Chen, Weiyang Liu, Yanjun Ma, Weijie Sun, Ruixia Wang, He Wang, Huikai Xu, Guangming Xue, Haisheng Yan, Zhen Yang, Jiayu Ding, Yang Gao, Feiyu Li, Yujia Zhang, Zikang Zhang, Yirong Jin, Haifeng Yu, Jianxin Chen, Fei Yan
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引用次数: 0

摘要

易于实现的量子逻辑门是量子计算机性能的基础,因为它控制着基本量子操作的准确性,并决定了实现量子算法的复杂性。扩展门集的传统方法通常需要在用于实现量子比特的理想参数范围之外操作器件,这导致控制复杂性增加,同时只提供有限的门集。在这里,我们通过实验证明了一种统一的通用门方案,能够在超导量子处理器上仅使用交换相互作用和量子比特驱动产生任意的双量子比特门。我们在广泛的常用双量子位一元系统中实现了平均99.38%的高保真度,实现了精确的多部纠缠态制备。此外,我们成功地制作了一个B门,它有效地合成了整个双量子比特门家族。我们的研究结果表明,充分利用交换相互作用的能力可以产生一个全面和高度精确的门集。我们的统一控制方案具有最大的表达能力,最佳的门时间,高保真度和易于适应其他量子平台,为量子硬件和算法开发提供了提高性能的前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Efficient implementation of arbitrary two-qubit gates using unified control

Efficient implementation of arbitrary two-qubit gates using unified control

Efficient implementation of arbitrary two-qubit gates using unified control
The set of quantum logic gates that can be easily implemented is fundamental to the performance of quantum computers, as it governs the accuracy of basic quantum operations and dictates the complexity of implementing quantum algorithms. Traditional approaches to extending gate sets often require operating devices outside the ideal parameter regimes used to realize qubits, leading to increased control complexity while offering only a limited set of gates. Here we experimentally demonstrate a unified and versatile gate scheme capable of generating arbitrary two-qubit gates using only an exchange interaction and qubit driving on a superconducting quantum processor. We achieve high fidelities averaging 99.38% across a wide range of commonly used two-qubit unitaries, enabling precise multipartite entangled state preparation. Furthermore, we successfully produce a B gate, which efficiently synthesizes the entire family of two-qubit gates. Our results establish that fully exploiting the capabilities of the exchange interaction can yield a comprehensive and highly accurate gate set. With maximum expressivity, optimal gate time, demonstrated high fidelity and easy adaption to other quantum platforms, our unified control scheme offers the prospect of improved performance in quantum hardware and algorithm development. The efficiency of a quantum computer depends on which basic operations it can implement. Now a scheme that can implement any two-qubit logic gate has been demonstrated on a superconducting architecture.
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来源期刊
Nature Physics
Nature Physics 物理-物理:综合
CiteScore
30.40
自引率
2.00%
发文量
349
审稿时长
4-8 weeks
期刊介绍: Nature Physics is dedicated to publishing top-tier original research in physics with a fair and rigorous review process. It provides high visibility and access to a broad readership, maintaining high standards in copy editing and production, ensuring rapid publication, and maintaining independence from academic societies and other vested interests. The journal presents two main research paper formats: Letters and Articles. Alongside primary research, Nature Physics serves as a central source for valuable information within the physics community through Review Articles, News & Views, Research Highlights covering crucial developments across the physics literature, Commentaries, Book Reviews, and Correspondence.
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