近日，东莞理工大学的刘增星及其研究小组与华南师范大学的Ya-Fei Yu等人合作并取得一项新进展。经过不懈努力，他们对腔磁力学混沌过程进行研究。相关研究成果已于2024年11月5日在国际知名学术期刊《物理评论A》上发表。

该研究团队提出一种实现磁力学混沌的有效机制，其中磁力学系统由包含泵浦场和探测场的双频微波场相干驱动。数值模拟表明，两个输入场的相对相位在控制混沌运动的出现方面起着重要作用，更重要的是，混沌的阈值功率从瓦级降低了6个数量级至微瓦级。

除了提供对磁振子非线性相互作用的深入见解外，腔磁力学混沌还因其在基础物理学和潜在应用（从超低阈值混沌运动到基于混沌的秘密信息处理）方面的重要性而始终备受关注。

据悉，利用铁磁晶体中的机械自由度实现的腔磁力学，为观察新兴磁振子自旋电子学领域中许多有趣的经典和量子非线性现象，提供了一个强大的平台。然而，迄今为止，由于磁振子固有的弱非线性相互作用，在腔磁力学系统中产生和控制混沌运动仍然是一个悬而未决的挑战。

附：英文原文

Title: Cavity magnomechanical chaos

Author: Jiao Peng, Zeng-Xing Liu, Ya-Fei Yu, Hao Xiong

Issue&Volume: 2024/11/05

Abstract: Cavity magnomechanics using mechanical degrees of freedom in ferromagnetic crystals provides a powerful platform for observing many interesting classical and quantum nonlinear phenomena in the emerging field of magnon spintronics. However, to date, the generation and control of chaotic motion in a cavity magnomechanical system remain an outstanding challenge due to the inherently weak nonlinear interaction of magnons. Here, we present an efficient mechanism for achieving magnomechanical chaos, in which the magnomechanical system is coherently driven by a two-tone microwave field consisting of a pump field and a probe field. Numerical simulations show that the relative phase of the two input fields plays an important role in controlling the appearance of chaotic motion and, more importantly, the threshold power of chaos is reduced by 6 orders of magnitude from watts to microwatts. In addition to providing insight into the nonlinear interaction of magnons, cavity magnomechanical chaos will always be of interest because of its significance in both fundamental physics and potential applications ranging from ultralow threshold chaotic motion to chaos-based secret information processing.

DOI: 10.1103/PhysRevA.110.053704

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.053704