This collection of perspective pieces captures recent advancements and reflections from a dynamic research community dedicated to bridging quantum gravity, hydrodynamics, and emergent cosmology. It explores four key research areas: (a) the interplay between hydrodynamics and cosmology, including analog gravity systems; (b) phase transitions, continuum limits and emergent geometry in quantum gravity; (c) relational perspectives in gravity and quantum gravity; and (d) the emergence of cosmological models rooted in quantum gravity frameworks. Each contribution presents the distinct perspectives of its respective authors. Additionally, the introduction by the editors proposes an integrative view, suggesting how these thematic units could serve as foundational pillars for a novel theoretical cosmology framework termed “hydrodynamics on superspace”.

这一系列观点作品捕捉了致力于弥合量子引力、流体动力学和新兴宇宙学的充满活力的研究社区的最新进展和反思。它探讨了四个关键研究领域：（a） 流体动力学和宇宙学之间的相互作用，包括模拟重力系统;（b） 量子引力中的相变、连续介质极限和新兴几何;（c） 引力和量子引力的关系观点;（d） 植根于量子引力框架的宇宙学模型的出现。每篇文章都展示了其各自作者的不同观点。此外，编辑的引言提出了一个综合观点，建议这些主题单位如何作为被称为“超空间流体动力学”的新型理论宇宙学框架的基础支柱。