| Literature DB >> 30951346 |
Ming Gong1,2, Ming-Cheng Chen1,2, Yarui Zheng1,2, Shiyu Wang1,2, Chen Zha1,2, Hui Deng1,2, Zhiguang Yan1,2, Hao Rong1,2, Yulin Wu1,2, Shaowei Li1,2, Fusheng Chen1,2, Youwei Zhao1,2, Futian Liang1,2, Jin Lin1,2, Yu Xu1,2, Cheng Guo1,2, Lihua Sun1,2, Anthony D Castellano1,2, Haohua Wang3, Chengzhi Peng1,2, Chao-Yang Lu1,2, Xiaobo Zhu1,2, Jian-Wei Pan1,2.
Abstract
We report the preparation and verification of a genuine 12-qubit entanglement in a superconducting processor. The processor that we designed and fabricated has qubits lying on a 1D chain with relaxation times ranging from 29.6 to 54.6 μs. The fidelity of the 12-qubit entanglement was measured to be above 0.5544±0.0025, exceeding the genuine multipartite entanglement threshold by 21 statistical standard deviations. After thermal cycling, the 12-qubit state fidelity was further improved to be above 0.707±0.008. Our entangling circuit to generate linear cluster states is depth invariant in the number of qubits and uses single- and double-qubit gates instead of collective interactions. Our results are a substantial step towards large-scale random circuit sampling and scalable measurement-based quantum computing.Year: 2019 PMID： 30951346 DOI： 10.1103/PhysRevLett.122.110501
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161