We present the first instance where post-quantum steering is a stronger-than-quantum resource for information processing – remote state preparation. In addition, we show that the phenomenon of post-quantum steering is not just a mere mathematical curiosity allowed by the no-signalling principle, but it may arise within compositional theories beyond quantum theory, hence making its study fundamentally relevant. We show these results by formulating a new compositional general probabilistic theory – which we call Witworld – with strong post-quantum features, which proves to be a intuitive and useful tool for exploring steering and its applications beyond the quantum realm.

我们提出了第一个实例，其中后量子转向是一种比量子更强大的信息处理资源——远程状态准备。此外，我们表明，后量子转向现象不仅仅是无信号原理允许的数学好奇心，它可能出现在量子理论之外的组合理论中，因此使其研究具有根本意义。我们通过制定具有强大后量子特征的新组合一般概率理论（我们称之为 Witworld）来展示这些结果，这被证明是探索转向及其在量子领域之外的应用的直观且有用的工具。