Tao Ziyu, Schmolke Finn, Hu Chang-Kang, Huang Wenhui, Zhou Yuxuan, Zhang Jiawei, Chu Ji, Zhang Libo, Sun Xuandong, Guo Zechen, Niu Jingjing, Weng Wenle, Liu Song, Zhong Youpeng, Tan Dian, Yu Dapeng, Lutz Eric
International Quantum Academy, Futian District, Shenzhen, Guangdong, China.
Shenzhen Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen, China.
Nat Commun. 2025 Sep 26;16(1):8457. doi: 10.1038/s41467-025-63196-6.
Random fluctuations can lead to cooperative effects in complex systems. We here report the observation of noise-induced quantum synchronization in a chain of superconducting transmon qubits with nearest-neighbor interactions. The application of Gaussian white noise to a single site leads to synchronous oscillations in the entire chain. We show that the two synchronized end qubits are entangled, with nonzero concurrence, and that they belong to a class of generalized Bell states known as maximally entangled mixed states, whose entanglement cannot be increased by any global unitary. We further demonstrate the stability against frequency detuning of both synchronization and entanglement by determining the corresponding generalized Arnold tongue diagrams. Our results highlight the constructive influence of noise in a quantum many-body system, and initiate the exploration of collective synchronization effects with stronger than classical correlations.
随机涨落能够在复杂系统中引发协同效应。我们在此报告了在具有最近邻相互作用的超导传输子量子比特链中对噪声诱导量子同步的观测结果。在单个位点施加高斯白噪声会导致整个链中出现同步振荡。我们表明，两个同步的末端量子比特是纠缠的，具有非零的并发度，并且它们属于一类被称为最大纠缠混合态的广义贝尔态，其纠缠不能通过任何全局幺正变换来增强。我们通过确定相应的广义阿诺德舌图进一步证明了同步和纠缠对频率失谐的稳定性。我们的结果突出了噪声在量子多体系统中的建设性影响，并开启了对具有比经典关联更强的集体同步效应的探索。
