Sunny.jl: A Julia Package for Spin Dynamics

David Dahlbom,Hao Zhang,Cole Miles, Sam Quinn, Alin Niraula, Bhushan Thipe,Matthew Wilson,Sakib Matin, Het Mankad, Steven Hahn,Daniel Pajerowski, Steve Johnston,Zhentao Wang, Harry Lane, Ying Wai Li, Xiaojian Bai,Martin Mourigal,Cristian D. Batista, Kipton Barros

arXiv · （2025）

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Abstract

Sunny is a Julia package designed to serve the needs of the quantum magnetism community. It supports the specification of a very broad class of spin models and a diverse suite of numerical solvers. These include powerful methods for simulating spin dynamics both in and out of equilibrium. Uniquely, it features a broad generalization of classical and semiclassical approaches to SU(N) coherent states, which is useful for studying systems exhibiting strong spin-orbit coupling or local entanglement effects. Sunny also offers a well-developed framework for calculating the dynamical spin structure factor, enabling direct comparison with scattering experiments. Ease of use is a priority, with tools for symmetry-guided modeling and interactive visualization.

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Pretraining has recently greatly promoted the development of natural language processing (NLP)
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【要点】：Sunny.jl 是一个Julia语言编写的软件包，为量子磁学领域提供广泛的spin模型规范和数值求解方法，特别针对SU(N)相干状态的广义经典和半经典方法，以及动态spin结构因子的计算框架。

【方法】：该软件包实现了对多种spin模型的模拟，包括在平衡态和非平衡态下的spin动力学模拟，并提供了一套用于SU(N)相干状态计算的广义方法。

【实验】：论文中未具体描述实验过程，但提到Sunny.jl能够用于散射实验的模拟，并通过计算动态spin结构因子与实验结果进行直接对比，具体使用的数据集未在摘要中提及。

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