Noise-induced quantum synchronization with entangled oscillations

Ziyu Tao, Finn Schmolke, Chang-Kang Hu, Wenhui Huang, Yuxuan Zhou, Jiawei Zhang, Ji Chu, Libo Zhang, Xuandong Sun, Zechen Guo, Jingjing Niu, Wenle Weng, Song Liu, Youpeng Zhong, Dian Tan (), Dapeng Yu () and Eric Lutz ()
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Ziyu Tao: Futian District
Finn Schmolke: University of Stuttgart
Chang-Kang Hu: Futian District
Wenhui Huang: Southern University of Science and Technology
Yuxuan Zhou: Futian District
Jiawei Zhang: Southern University of Science and Technology
Ji Chu: Futian District
Libo Zhang: Southern University of Science and Technology
Xuandong Sun: Southern University of Science and Technology
Zechen Guo: Southern University of Science and Technology
Jingjing Niu: Futian District
Wenle Weng: The University of Adelaide
Song Liu: Futian District
Youpeng Zhong: Futian District
Dian Tan: Futian District
Dapeng Yu: Futian District
Eric Lutz: University of Stuttgart

Nature Communications, 2025, vol. 16, issue 1, 1-7

Abstract: Abstract 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.

Date: 2025
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DOI: 10.1038/s41467-025-63196-6

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