近日，电子科技大学的王子南及其研究小组与巴西伯南布哥联邦大学的Anderson S. L. Gomes等人合作并取得一项新进展。经过不懈努力，他们提出一维瑞利散射系统中的复本对称性破缺理论并进行验证。相关研究成果已于2024年7月2日在国际知名学术期刊《光：科学与应用》上发表。

本文首次建立了基于RS-based RFL平台研究光子相变的精确理论模型，清楚地揭示了除了泵浦功率外，RFL中的光子相位变化也类似于自旋玻璃相变中的温度项，从而对光子相变的内在机制有了新的认识。此外，基于该模型和实时高保真检测光谱演化，研究人员从理论上预测和实验上观察了基于瑞利散射的RFL中光子相变的模式不对称特性。这一发现有助于更深入地了解光子RSB机制和基于瑞利散射的RFL动力学。

据悉，自旋玻璃理论作为描述无序磁系统的范例，构成了统计物理学研究的一个突出课题。复本对称性破缺(RSB)是理解自旋玻璃理论的关键概念之一，它意味着在相同的条件下，无序系统可以产生具有非平凡相关性的不同状态。由于瑞利散射的无序性和随机性，基于瑞利散射的随机光纤激光器是一个复杂的无序系统。

附：英文原文

Title: Replica symmetry breaking in 1D Rayleigh scattering system: theory and validations

Author: Qi, Yifei, Ni, Longqun, Ye, Zhenyu, Zhang, Jiaojiao, Bao, Xingyu, Wang, Pan, Rao, Yunjiang, Raposo, Ernesto P., Gomes, Anderson S. L., Wang, Zinan

Issue&Volume: 2024-07-02

Abstract: Spin glass theory, as a paradigm for describing disordered magnetic systems, constitutes a prominent subject of study within statistical physics. Replica symmetry breaking (RSB), as one of the pivotal concepts for the understanding of spin glass theory, means that under identical conditions, disordered systems can yield distinct states with nontrivial correlations. Random fiber laser (RFL) based on Rayleigh scattering (RS) is a complex disordered system, owing to the disorder and stochasticity of RS. In this work, for the first time, a precise theoretical model is elaborated for studying the photonic phase transition via the platform of RS-based RFL, in which we clearly reveal that, apart from the pump power, the photon phase variation in RFL is also an analogy to the temperature term in spin-glass phase transition, leading to a novel insight into the intrinsic mechanisms of photonic phase transition. In addition, based on this model and real-time high-fidelity detection spectral evolution, we theoretically predict and experimentally observe the mode-asymmetric characteristics of photonic phase transition in RS-based RFL. This finding contributes to a deeper understanding of the photonic RSB regime and the dynamics of RS-based RFL.

DOI: 10.1038/s41377-024-01475-5

Source: https://www.nature.com/articles/s41377-024-01475-5