Quantum walks on a programmable two-dimensional 62-qubit superconducting processor,Science

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Quantum walks on a programmable two-dimensional 62-qubit superconducting processor
Science ( IF 44.7 ) Pub Date : 2021-05-28 , DOI: 10.1126/science.abg7812
Ming Gong _{1,

2,

3} , Shiyu Wang _{1,

2,

3} , Chen Zha _{1,

2,

3} , Ming-Cheng Chen _{1,

2,

3} , He-Liang Huang _{1,

2,

3} , Yulin Wu _{1,

2,

3} , Qingling Zhu _{1,

2,

3} , Youwei Zhao _{1,

2,

3} , Shaowei Li _{1,

2,

3} , Shaojun Guo _{1,

2,

3} , Haoran Qian _{1,

2,

3} , Yangsen Ye _{1,

2,

3} , Fusheng Chen _{1,

2,

3} , Chong Ying _{1,

2,

3} , Jiale Yu _{1,

2,

3} , Daojin Fan _{1,

2,

3} , Dachao Wu _{1,

2,

3} , Hong Su _{1,

2,

3} , Hui Deng _{1,

2,

3} , Hao Rong _{1,

2,

3} , Kaili Zhang _{1,

2,

3} , Sirui Cao _{1,

2,

3} , Jin Lin _{1,

2,

3} , Yu Xu _{1,

2,

3} , Lihua Sun _{1,

2,

3} , Cheng Guo _{1,

2,

3} , Na Li _{1,

2,

3} , Futian Liang _{1,

2,

3} , V. M. Bastidas ₄ , Kae Nemoto ₅ , W. J. Munro _{4,

5} , Yong-Heng Huo _{1,

2,

3} , Chao-Yang Lu _{1,

2,

3} , Cheng-Zhi Peng _{1,

2,

3} , Xiaobo Zhu _{1,

2,

3} , Jian-Wei Pan _{1,

2,

3}

Affiliation

Quantum walks are the quantum mechanical analog of classical random walks and an extremely powerful tool in quantum simulations, quantum search algorithms, and even for universal quantum computing. In our work, we have designed and fabricated an 8-by-8 two-dimensional square superconducting qubit array composed of 62 functional qubits. We used this device to demonstrate high-fidelity single- and two-particle quantum walks. Furthermore, with the high programmability of the quantum processor, we implemented a Mach-Zehnder interferometer where the quantum walker coherently traverses in two paths before interfering and exiting. By tuning the disorders on the evolution paths, we observed interference fringes with single and double walkers. Our work is a milestone in the field, bringing future larger-scale quantum applications closer to realization for noisy intermediate-scale quantum processors.

中文翻译：

Quantum 在可编程二维 62 量子位超导处理器上行走

量子游走是经典随机游走的量子力学模拟，是量子模拟、量子搜索算法甚至通用量子计算中极其强大的工具。在我们的工作中，我们设计并制造了一个由 62 个功能量子位组成的 8×8 二维方形超导量子位阵列。我们使用该设备来演示高保真单粒子和双粒子量子行走。此外，凭借量子处理器的高度可编程性，我们实现了 Mach-Zehnder 干涉仪，其中量子步行者在干涉和退出之前在两条路径上相干地穿越。通过调整进化路径上的障碍，我们观察到了单行人和双行人的干扰条纹。我们的工作是该领域的里程碑，

更新日期：2021-05-28

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