Ultralocality and slow contraction
Ultralocality and slow contraction
复制标题
超局域性和慢收缩
DOI:
10.1088/1475-7516/2021/06/013
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发表时间:
2021
影响因子:
6.4
通讯作者:
Cook, William G.
中科院分区:
文献类型:
--
作者:
Ijjas, Anna;Sullivan, Andrew P.;Pretorius, Frans;Steinhardt, Paul J.;Cook, William G.
We study the detailed process by which slow contraction smooths and flattens the universe using an improved numerical relativity code that accepts initial conditions with non-perturbative deviations from homogeneity and isotropy along two independent spatial directions. Contrary to common descriptions of the early universe, we find that the geometry first rapidly converges to an inhomogeneous, spatially-curved and anisotropic ultralocal state in which all spatial gradient contributions to the equations of motion decrease as an exponential in time to negligible values. This is followed by a second stage in which the geometry converges to a homogeneous, spatially flat and isotropic spacetime. In particular, the decay appears to follow the same history whether the entire spacetime or only parts of it are smoothed by the end of slow contraction.
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DOI:
10.1007/s000230200000
发表时间:
2002
期刊:
Annales Henri Poincaré
影响因子:
--
作者:
T. Damour;M. Henneaux;A. Rendall;M. Weaver
通讯作者:
M. Weaver
影响因子:
2.6
作者:
I. Rodnianski;Jared Speck
通讯作者:
Jared Speck
影响因子:
5
作者:
Garfinkle, David;Pretorius, Frans
通讯作者:
Pretorius, Frans
影响因子:
5
作者:
W. C. Lim;L. Andersson;D. Garfinkle;F. Pretorius
通讯作者:
F. Pretorius
影响因子:
6.4
作者:
Ijjas, Anna;Cook, William G.;Pretorius, Frans;Steinhardt, Paul J.;Davies, Elliot Y.
通讯作者:
Davies, Elliot Y.