arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1801.04043quant-ph
收藏

18-光子三自由度量子比特纠缠

18-qubit entanglement with photon's three degrees of freedom

Xi-Lin Wang, Yi-Han Luo, He-Liang Huang, Ming-Cheng Chen, Zu-En Su, Chang Liu, Chao Chen, Wei Li, Yu-Qiang Fang, Xiao Jiang, Jun Zhang, Li Li, Nai-Le Liu, Chao-… 展开作者

Xi-Lin Wang, Yi-Han Luo, He-Liang Huang, Ming-Cheng Chen, Zu-En Su, Chang Liu, Chao Chen, Wei Li, Yu-Qiang Fang, Xiao Jiang, Jun Zhang, Li Li, Nai-Le Liu, Chao-Yang Lu, Jian-Wei Pan

摘要:

量子信息科学的一个中心主题是相干地控制越来越多的量子粒子及其内部和外部自由度(DoF),同时保持高水平的相干性。通过单独控制和测量每个量子比特来创建和验证多粒子纠缠的能力是量子技术的重要基准。为此,真正的多体纠缠已经报道了多达14个捕获的离子,10个光子和10个超导量子比特。在这里,我们通过同时利用六个光子的三个不同的自由度,包括它们的路径,偏振和轨道角动量(OAM),实验证明了18量子位Greenberger-Horne-Zeilinger(GHZ)纠缠。我们开发了高稳定性的干涉仪,用于光子不同DoF之间的可逆量子逻辑运算,精度和效率接近统一,能够同时读出18量子位状态的262,144个结果组合。测量到的状态保真度为0.708(16),证实了所有18个量子比特的真正纠缠。

英文摘要:

A central theme in quantum information science is to coherently control an increasing number of quantum particles as well as their internal and external degrees of freedom (DoFs), meanwhile maintaining a high level of coherence. The ability to create and verify multiparticle entanglement with individual control and measurement of each qubit serves as an important benchmark for quantum technologies. To this end, genuine multipartite entanglement have been reported up to 14 trapped ions, 10 photons, and 10 superconducting qubits. Here, we experimentally demonstrate an 18-qubit Greenberger-Horne-Zeilinger (GHZ) entanglement by simultaneous exploiting three different DoFs of six photons, including their paths, polarization, and orbital angular momentum (OAM). We develop high-stability interferometers for reversible quantum logic operations between the photon's different DoFs with precision and efficiencies close to unity, enabling simultaneous readout of 262,144 outcome combinations of the 18-qubit state. A state fidelity of 0.708(16) is measured, confirming the genuine entanglement of all the 18 qubits.

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。

↑