近日，南开大学许京军团队研究了非互易光相互作用中不寻常的冲量-动量关系。这一研究成果于2026年2月9日发表在《光：科学与应用》杂志上。

非互易相互作用以作用与反作用间的非对称关系为特征，是生命系统与人工系统中诸多奇特现象的基础。尽管已有广泛研究，但波动非线性相互作用中的非互易性仍远未得到充分探索。

研究组报道了一种具有非互易内部相互作用的光学孤子波所表现出的异常脉冲-动量关系。当脉冲作用于该孤子波的两个组分之一时，孤子波可获得相对于该脉冲增强或反转的动量。在孤子波未被破坏的状态下，其脉冲-动量关系呈线性，但其斜率表现异常——或大于1，甚至可为负值。这些发现可能引发对非互易波相互作用更基础的思考，有助于设计新型非厄米器件。

附：英文原文

Title: Unusual impulse-momentum relationship in non-reciprocal light interactions

Author: Zhuang, Yuhui, Wu, Juan, Li, Siyu, Hu, Yi, Chen, Zhigang, Xu, Jingjun

Issue&Volume: 2026-02-09

Abstract: Non-reciprocal interactions, featured with an asymmetric relation between action and reaction, underpin exotic phenomena across living and artificial systems. Albeit extensively studied, they have been largely underexplored in nonlinear interactions of waves. In this work, we report an unusual impulse-momentum relationship for an optical solitary wave whose internal interactions are non-reciprocal. The solitary wave gains either an enhanced or a reversed momentum relative to an impulse that is applied to one of its two components. In the regime where the solitary wave is not broken down, the impulse-momentum relationship is found to be linear, yet its slope is unusual - either exceeding one or even being negative. Our results may initiate more fundamental considerations related to non-reciprocal wave interactions that are useful for designing novel non-Hermitian devices.

DOI: 10.1038/s41377-025-02139-8

Source: https://www.nature.com/articles/s41377-025-02139-8