The Trace-Free Einstein Equations and inflation - INSPIRE

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The Trace-Free Einstein Equations and inflation

George F R Ellis
(
)

Jun 13, 2013

14 pages

Published in:

Gen.Rel.Grav. 46 (2014) 1619

e-Print:

1306.3021 [gr-qc]

DOI:

10.1007/s10714-013-1619-5

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Abstract: (arXiv)

The trace-free version of the Einstein Gravitational equations, essentially equivalent to unimodular gravity, can solve the troubling issue of the huge discrepancy between quantum field theory estimates of the vacuum energy density and the astronomically observed value of the cosmological constant. However it has been suggested that this proposal cannot work because it prevents the inflaton potential energy from driving inflation. It is shown here that that concern is unjustified: inflation proceeds as usual if we adopt the trace free gravitational equations.

Note:

12 pages. Version accepted by GRG Journal. New section added on relation of present and inflationary values

Cosmology
Inflation
Dark energy
Trace-free equations
gravitation: unimodular
inflaton: potential
potential: energy
energy: density
inflation
cosmological constant

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Figures(0)

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