TY - JOUR
T1 - Journeys through antigravity?
AU - Carrasco, John Joseph
AU - Chemissany, Wissam
AU - Kallosh, Renata
PY - 2014/1
Y1 - 2014/1
N2 - A possibility of journeys through antigravity has recently been proposed, with the suggestion that Weyl-invariant extension of scalars coupled to Einstein gravity allows for an unambiguous classical evolution through cosmological singularities in anisotropic spacetimes. We compute the Weyl invariant curvature squared and find that it blows up for the proposed anisotropic solution both at the Big Crunch as well as at the Big Bang. Therefore the cosmological singularities are not resolved by uplifting Einstein theory to a Weyl invariant model.
AB - A possibility of journeys through antigravity has recently been proposed, with the suggestion that Weyl-invariant extension of scalars coupled to Einstein gravity allows for an unambiguous classical evolution through cosmological singularities in anisotropic spacetimes. We compute the Weyl invariant curvature squared and find that it blows up for the proposed anisotropic solution both at the Big Crunch as well as at the Big Bang. Therefore the cosmological singularities are not resolved by uplifting Einstein theory to a Weyl invariant model.
KW - Classical Theories of Gravity
KW - Spacetime Singularities
UR - http://www.scopus.com/inward/record.url?scp=84893832591&partnerID=8YFLogxK
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U2 - 10.1007/JHEP01(2014)130
DO - 10.1007/JHEP01(2014)130
M3 - Article
AN - SCOPUS:84893832591
SN - 1126-6708
VL - 2014
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 1
M1 - 130
ER -