Quantum walks on a programmable two-dimensional 62-qubit superconducting processor
Abstract
Quantum walks are the quantum mechanical analogue 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 8x8 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 an essential milestone in the field, brings future larger scale quantum applications closer to realization on these noisy intermediate-scale quantum processors.
Cite
@article{arxiv.2102.02573,
title = {Quantum walks on a programmable two-dimensional 62-qubit superconducting processor},
author = {Ming Gong and Shiyu Wang and Chen Zha and Ming-Cheng Chen and He-Liang Huang and Yulin Wu and Qingling Zhu and Youwei Zhao and Shaowei Li and Shaojun Guo and Haoran Qian and Yangsen Ye and Fusheng Chen and Chong Ying and Jiale Yu and Daojin Fan and Dachao Wu and Hong Su and Hui Deng and Hao Rong and Kaili Zhang and Sirui Cao and Jin Lin and Yu Xu and Lihua Sun and Cheng Guo and Na Li and Futian Liang and V. M. Bastidas and Kae Nemoto and W. J. Munro and Yong-Heng Huo and Chao-Yang Lu and Cheng-Zhi Peng and Xiaobo Zhu and Jian-Wei Pan},
journal= {arXiv preprint arXiv:2102.02573},
year = {2021}
}
Comments
13 pages, 4 figures, and supplementary materials with 21 pages, 13 figures and 1 table