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SUMMARY:Sudden singularities in f(R\,T) gravity
DTSTART;VALUE=DATE-TIME:20220506T131500Z
DTEND;VALUE=DATE-TIME:20220506T133000Z
DTSTAMP;VALUE=DATE-TIME:20240715T031518Z
UID:indico-contribution-494@indico.ice.csic.es
DESCRIPTION:Speakers: Tiago Gonçalves (online) (Instituto de Astronomia e
Astrofísica e Ciências do Espaço)\nMight the universe\, one day\, unde
rgo a Big Crunch\, Big Freeze\, Big Rip\, or some other singularity? A "su
dden singularity" occurs if the energy density\, the scale factor and the
Hubble function remain finite while there is a divergence in higher deriva
tives of the scale factor which could be accompanied by a pressure diverge
nce. We investigate whether sudden singularities could arise in the f(R\,T
) theory of modified gravity. We find that the conservation of matter can
prevent sudden singularities in this theory. However\, due to matter-geome
try couplings\, f(R\,T) gravity does not require matter conservation. Thus
\, we investigate a particular model where there is a sudden singularity i
n the third time derivative of the scale factor.\n\nhttps://indico.ice.csi
c.es/event/27/contributions/494/
LOCATION:
URL:https://indico.ice.csic.es/event/27/contributions/494/
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