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The nonlinear future stability of the FLRW family of solutions to the Euler–Einstein system with a positive cosmological constant

Author(s)
Speck, Jared R.
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Abstract
In this article, we study small perturbations of the family of Friedmann–Lemaître–Robertson–Walker cosmological background solutions to the 1 + 3 dimensional Euler–Einstein system with a positive cosmological constant. These background solutions describe an initially uniform quiet fluid of positive energy density evolving in a spacetime undergoing accelerated expansion. Our nonlinear analysis shows that under the equation of state p=c[2 over s]ρ, 0 < c[2 over s] < 1/3 , the background solutions are globally future-stable. In particular, we prove that the perturbed spacetime solutions, which have the topological structure [0,∞) × T[superscript 3], are future-causally geodesically complete. These results are extensions of previous results derived by the author in a collaboration with I. Rodnianski, in which the fluid was assumed to be irrotational. Our novel analysis of a fluid with non-zero vorticity is based on the use of suitably defined energy currents.
Description
Original manuscript January 24, 2012
Date issued
2012-04
URI
http://hdl.handle.net/1721.1/81955
Department
Massachusetts Institute of Technology. Department of Mathematics
Journal
Selecta Mathematica
Publisher
Springer-Verlag
Citation
Speck, Jared. “The nonlinear future stability of the FLRW family of solutions to the Euler–Einstein system with a positive cosmological constant.” Selecta Mathematica 18, no. 3 (September 19, 2012): 633-715.
Version: Original manuscript
ISSN
1022-1824
1420-9020

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