发表机构
Nordita, KTH Royal Institute of Technology and Stockholm University; The Oskar Klein Centre, Stockholm University; Instituut-Lorentz of Theoretical Physics, Universiteit Leiden; McWilliams Center for Cosmology & Department of Physics, Carnegie Mellon University; School of Natural Sciences and Medicine, Ilia State University（诺尔迪塔，皇家理工学院与斯德哥尔摩大学; 奥斯卡·克莱因中心，斯德哥尔摩大学; 莱顿大学洛伦兹理论物理研究所; 卡内基梅隆大学麦克威廉姆斯宇宙学中心与物理系; 伊利亚州立大学自然科学与医学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文首次将暴胀动力学与磁流体演化直接关联，发现暴胀子驱动的逆级联和湍流，其动能主导并放大磁场，导致更陡的磁能衰减，需在后续演化中考虑。
AI 中文摘要
我们首次建立了暴胀动力学与随后磁流体动力学演化之间的直接联系。从真空涨落出发，我们自洽地演化暴胀子-等离子体耦合系统，历经暴胀、再加热并进入辐射主导时期。我们发现一种由暴胀子驱动的逆级联，随后是自由衰减的湍流，其中动能主导磁能并驱动发电机放大。暴胀子驱动的湍流导致磁能衰减比螺旋湍流更陡，因此应在原初磁场及其当前可观测量的后续演化中予以考虑。
英文摘要
For the first time, we establish a direct connection between inflationary dynamics and the subsequent magnetohydrodynamic evolution. Starting from vacuum fluctuations, we self-consistently evolve the coupled inflaton-plasma system through inflation, reheating, and into the radiation-dominated era. We find an inflaton-driven inverse cascade followed by freely decaying turbulence, with kinetic energy dominating over magnetic energy and driving dynamo amplification. The inflaton-driven turbulence causes steeper magnetic energy decay than helical turbulence and should therefore be accounted for subsequent evolution of primordial fields and their present-day observables.
Comments11 pages, 4 figures
