This white paper reports on the discussions of the 2018 Facility for Rare Isotope Beams Theory Alliance (FRIB-TA) topical program ‘From bound states to the continuum: Connecting bound state calculations with scattering and reaction theory’. One of the biggest and most important frontiers in nuclear theory today is to construct better and stronger bridges between bound state calculations and calculations in the continuum, especially scattering and reaction theory, as well as teasing out the influence of the continuum on states near threshold. This is particularly challenging as many-body structure calculations typically use a bound state basis, while reaction calculations more commonly utilize few-body continuum approaches. The many-body bound state and few-body continuum methods use different language and emphasize different properties. To build better foundations for these bridges, we present an overview of several bound state and continuum methods and, where possible, point to current and possible future connections.

本白皮书报告了2018年稀有同位素束理论联盟（FRIB-TA）主题计划``从束缚态到连续统：将束缚态计算与散射和反应理论联系起来''的讨论。当今核理论中最大和最重要的前沿之一是在束缚态计算与连续体中的计算之间建立更好和更强的桥梁，特别是散射和反应理论，以及消除连续体对阈值附近状态的影响。这是特别具有挑战性的，因为多体结构计算通常使用绑定状态基础，而反应计算更通常采用少体连续体方法。多体束缚状态和少体连续方法使用不同的语言并强调不同的属性。