Fajman David, Ofner Maximilian, Wyatt Zoe
Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna, Austria.
Department of Pure Mathematics and Mathematical Statistics, Wilberforce Road, Cambridge, CB3 0WB UK.
Arch Ration Mech Anal. 2024;248(5):83. doi: 10.1007/s00205-024-02030-7. Epub 2024 Sep 13.
We establish the future nonlinear stability of a large class of FLRW models as solutions to the Einstein-Dust system. We consider the case of a vanishing cosmological constant, which, in particular implies that the expansion rate of the respective models is linear, i.e. has zero acceleration. The resulting spacetimes are future globally regular. These solutions constitute the first generic class of future regular Einstein-Dust spacetimes not undergoing accelerated expansion and are thereby the slowest expanding generic family of future complete Einstein-Dust spacetimes currently known.
我们确立了一大类弗里德曼-勒梅特-罗伯逊-沃尔克(FLRW)模型作为爱因斯坦-尘埃系统解的未来非线性稳定性。我们考虑宇宙学常数消失的情况,这尤其意味着相应模型的膨胀率是线性的,即加速度为零。由此产生的时空在未来是全局正则的。这些解构成了第一类未来正则的、不经历加速膨胀的爱因斯坦-尘埃时空,因此是目前已知的未来完备爱因斯坦-尘埃时空中膨胀最慢的一般族。