Authors
Yi Li, Zihan Xie, Xiaodong Yang, Yue Li, Xingyu Zhao, Xu Cheng, Xinhua Peng, Jun Li, Eric Lutz, Yiheng Lin, Jiangfeng Du
Published in
Science advances. Volume 11. Issue 41. Pages eady5649. Oct 10, 2025. Epub Oct 10, 2025.
Abstract
Classical self-sustained oscillators, which generate periodic motion without periodic external forcing, are ubiquitous in science and technology. The realization of nonclassical self-oscillators is an important goal of quantum physics. We here present the experimental implementation of a quantum van der Pol oscillator, a paradigmatic autonomous quantum driven-dissipative system with nonlinear damping, using a single trapped atom. We demonstrate the existence of a quantum limit cycle in phase space in the absence of a drive and the occurrence of quantum synchronization when the nonlinear oscillator is externally driven. We additionally show that synchronization can be enhanced with the help of squeezing perpendicular to the direction of the drive and, counterintuitively, linear dissipation. We also observe the bifurcation to a bistable phase-space distribution for large squeezing. Our results pave the way for the exploration of self-sustained quantum oscillators and their application to quantum technology.
PMID:
41071883
Bibliographic data and abstract were imported from PubMed on 11 Oct 2025.
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