当前位置: X-MOL 学术arXiv.cond-mat.dis-nn › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Replica symmetry breaking in random lasers]{Replica symmetry breaking in random lasers: \\ experimental measurement of the overlap distribution
arXiv - PHYS - Disordered Systems and Neural Networks Pub Date : 2022-09-08 , DOI: arxiv-2209.03781
Claudio Conti, Neda Ghofraniha, Luca Leuzzi, Giancarlo Ruocco

In this chapter we report on the measurements of the overlap distribution of the replica symmetry breaking solution in complex disordered systems. After a general introduction to the problem of the experimental validation of the Parisi order parameter, we focus on the systems where the measurement has been possible for the first time: random lasers. Starting from first principles of light-matter interaction we sketch the main steps leading to the construction of the statistical mechanical model for the dynamics of light modes in a random laser, a spherical multi-p-spin model with complex spins. A new overlap is introduced, the intensity fluctuation overlap, whose probability distribution, under specific assumptions, is equivalent to the Parisi overlap distribution. The experimental protocol for measuring this overlap is based on the possibility of experimentally realizing real replicas. After a description of the first experiment on the random laser made of T5CO$_x$ grains we review and discuss various experiments measuring the overlap distribution, as well the possible connection with Levy-like distribution of the intensity of the light modes around the laser threshold, the connection with turbulence in fiber lasers and the role of spatial etherogeneities of light modes in random media.

中文翻译:

随机激光中的复制对称破坏]{随机激光中的复制对称破坏:\\重叠分布的实验测量

在本章中,我们报告了复杂无序系统中复制对称破坏解的重叠分布的测量。在对 Parisi 阶参数的实验验证问题进行了一般性介绍之后,我们将重点关注第一次可以进行测量的系统:随机激光器。从光-物质相互作用的第一原理开始,我们勾勒出导致构建随机激光器中光模式动力学的统计力学模型的主要步骤,这是一个具有复杂自旋的球形多 p 自旋模型。引入了一种新的重叠,强度波动重叠,其概率分布在特定假设下等效于帕里西重叠分布。测量这种重叠的实验协议是基于实验实现真实复制品的可能性。在描述了由 T5CO$_x$ 颗粒制成的随机激光的第一个实验之后,我们回顾并讨论了测量重叠分布的各种实验,以及与激光阈值附近光模式强度的 Levy 样分布的可能联系,与光纤激光器中的湍流的联系以及光模式在随机介质中的空间以太均匀性的作用。
更新日期:2022-09-09
down
wechat
bug