The singularity in mimetic Kantowski-Sachs cosmology
The singularity in mimetic Kantowski-Sachs cosmology
复制标题
模仿康托夫斯基-萨克斯宇宙学中的奇点
DOI:
10.1088/1475-7516/2020/07/018
复制
发表时间:
2020
影响因子:
6.4
通讯作者:
E. Wilson
中科院分区:
文献类型:
--
作者:
M. de Cesare;S. Seahra;E. Wilson
The dynamics of the vacuum Kantowski-Sachs space-time are studied in the so-called limiting curvature mimetic gravity theory. It is shown that in this theory the vacuum Kantowski-Sachs space-time is always singular. While the departures from general relativity due to the limiting curvature mimetic theory do provide an upper bound on the magnitude of the expansion scalar, both its rate of oscillations and the magnitude of the directional Hubble rates increase without bound and cause curvature invariants to diverge. Also, since the radial scale factor does not vanish in finite (past) time, in this particular theory the Kantowski-Sachs space-time cannot be matched to a null black hole event horizon and, therefore, does not correspond to the interior of a static and spherically symmetric black hole.
DOI:
10.1002/prop.201900103
发表时间:
2019
期刊:
Fortschritte der Physik
影响因子:
--
作者:
Chamseddine, Ali H.;Mukhanov, Viatcheslav;Russ, Tobias B.
通讯作者:
Russ, Tobias B.
影响因子:
5.4
作者:
Chamseddine, Ali H.;Mukhanov, Viatcheslav
通讯作者:
Mukhanov, Viatcheslav