Efficient few-body calculations in finite volume
Efficient few-body calculations in finite volume
复制标题
有限体积内的高效少体计算
DOI：
10.1088/1742-6596/2453/1/012025
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
König, S
中科院分区：
文献类型：
--
作者：
König, S
在有限体积中模拟量子系统是提取有关它们的信息的强大理论工具。系统的真实世界属性被编码在其离散能级如何随体积的大小而变化。这种方法不仅适用于核物理，其中用于少核子和多核子状态的晶格方法补充了唯象壳模型描述和基于谐振子展开的原子核从头计算，而且适用于其他领域，如冷原子系统的模拟。这一贡献介绍了最近的进展，有关有限体积模拟的少体系统。特别是，它讨论了有关可分离的相互作用的有效的数值实现的细节，它提出了本征向量延拓作为一种方法，用于执行强大的和有效的体积外推。
Simulating quantum systems in a finite volume is a powerful theoretical tool to extract information about them. Real-world properties of the system are encoded in how its discrete energy levels change with the size of the volume. This approach is relevant not only for nuclear physics, where lattice methods for few-and many-nucleon states complement phenomenological shell-model descriptions and ab initio calculations of atomic nuclei based on harmonic oscillator expansions, but also for other fields such as simulations of cold atomic systems. This contribution presents recent progress concerning finite-volume simulations of few-body systems. In particular, it discusses details regarding the efficient numerical implementation of separable interactions and it presents eigenvector continuation as a method for performing robust and efficient volume extrapolations.