近日，延边大学朱爱东团队研究了噪声消除引起的量子纠缠浪涌。相关论文于2026年4月13日发表在《物理评论A》杂志上。

研究组构建了一个结构对称的腔磁系统，它可以协同增强量子纠缠和量子转向的方向控制，为解决这一挑战提供了一条潜在的途径。通过应用参数抽运，单压缩表示中的非线性模间相互作用得到了显著加强，从而引发了纠缠态的大幅增加。然而，这种增强的挤压不可避免地引起噪声放大。为了抵消这一点，研究组引入了一个额外的宽带压缩真空场来诱导两个噪声场之间的相消干涉。该理论分析表明，当两个噪声场的相位满足最佳匹配条件时，放大的噪声被有效抑制，同时在更宽的参数范围内保持更强的纠缠。

这种“耦合增强和噪声消除”的协同作用可能有助于提高量子操纵的稳定性。在这种降噪机制下，研究组进一步实现了对量子转向方向性的精确控制，并得到了模式总体分析的支持。提出的“压缩增强与噪声消除相结合”策略具有广泛的适应性，可以扩展到不同的量子系统。这项工作可能为推进单向量子计算和基于纠缠的量子通信提供一条可行的途径。

附：英文原文

Title: Noise-cancellation-induced surge of quantum entanglement

Author: Nan Wang, Shi-Yan Li, Wei-Yue Zhang, Xiao-Fei Ou, Ai-Dong Zhu, Lin Yu

Issue&Volume: 2026/04/13

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.

DOI: 10.1103/d774-199h

Source: https://journals.aps.org/pra/abstract/10.1103/d774-199h