Is Cosmic Speed-Up Due to New Gravitational Physics? - INSPIRE

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Is Cosmic Speed-Up Due to New Gravitational Physics?

Sean M. Carroll
(
- Chicago U., EFI and
- Chicago U. and
- Chicago U., KICP
)
,
Vikram Duvvuri
(
- Chicago U., EFI and
- Chicago U. and
- Chicago U., KICP
)
,
Mark Trodden
(
- Syracuse U.
)
,
Michael S. Turner
(
- Chicago U., EFI and
- Chicago U. and
- Chicago U., KICP and
- Chicago U., Astron. Astrophys. Ctr. and
- Fermilab
)

Jun, 2003

4 pages

Published in:

Phys.Rev.D 70 (2004) 043528

e-Print:

astro-ph/0306438 [astro-ph]

DOI:

10.1103/PhysRevD.70.043528

Report number:

FERMILAB-PUB-03-263-A,
SU-GP-03-6-2

View in:

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Abstract: (arXiv)

We show that cosmic acceleration can arise due to very tiny corrections to the usual gravitational action of General Relativity of the form

R^n

, with

n<0

. This eliminates the need for dark energy, though it does not address the cosmological constant problem. Since a modification to the Einstein-Hilbert action of the form

R^n

, with

n>0

, can lead to early-time inflation, our proposal provides a unified and purely gravitational origin for the early and late time accelerating phases of the Universe.

04.50.+h
98.80.-k
astrophysics: acceleration
general relativity
gravitation: correction
dark energy
inflation
cosmic radiation: anisotropy
numerical calculations

References(36)

Figures(0)

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C. Armendariz-Picon
(
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)
,
Viatcheslav F. Mukhanov
(
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)
,
Paul J. Steinhardt
(
- Princeton U.
)

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•
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Laura Mersini-Houghton
(
- Pisa, Scuola Normale Superiore and
- INFN, Pisa
)
,
Mar Bastero-Gil
(
- Pisa, Scuola Normale Superiore and
- INFN, Pisa
)
,
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(
- Pisa, Scuola Normale Superiore and
- INFN, Pisa
)

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(
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)

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•
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Can the dark energy equation-of-state parameter $w$ be less than $−1$ ?

Sean M. Carroll
(
- Chicago U., EFI and
- Chicago U. and
- Chicago U., KICP
)
,
Mark Hoffman
(
- Chicago U., EFI and
- Chicago U. and
- Chicago U., KICP
)
,
Mark Trodden
(
- Syracuse U.
)

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•
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•
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Varun Sahni
(
- IUCAA, Pune
)
,
Alexei A. Starobinsky
(
- Landau Inst.
)

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Cedric Deffayet
(
- New York U.
)
,
G.R. Dvali
(
- New York U.
)
,
Gregory Gabadadze
(
- Minnesota U., Theor. Phys. Inst.
)

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•
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Katherine Freese
(
- Michigan U.
)
,
Matthew Lewis
(
- Michigan U.
)

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•
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•
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Maqbool Ahmed
(
- Syracuse U.
)
,
Scott Dodelson
(
- Fermilab and
- Chicago U., Astron. Astrophys. Ctr.
)
,
Patrick B. Greene
(
- Fermilab
)
,
Rafael Sorkin
(
- Syracuse U.
)

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•
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•
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Nima Arkani-Hamed
(
- Harvard U., Phys. Dept.
)
,
Savas Dimopoulos
(
- Stanford U., Phys. Dept.
)
,
Gia Dvali
(
- New York U.
)
,
Gregory Gabadadze
(
- CERN
)

e-Print:
- hep-th/0209227

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Gia Dvali
(
- New York U.
)
,
Michael S. Turner
(
- Chicago U., Astron. Astrophys. Ctr. and
- Chicago U., KICP and
- Chicago U., EFI and
- Fermilab
)

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Alexei A. Starobinsky
(
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- Landau Inst.
)

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