Cosmological Solutions of a Nonlocal Model with a Perfect Fluid - INSPIRE

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Cosmological Solutions of a Nonlocal Model with a Perfect Fluid

Emilio Elizalde
(
- Barcelona, IEEC and
- CSIC, Catalunya
)
,
Ekaterina O. Pozdeeva
(
- SINP, Moscow
)
,
Sergey Yu. Vernov
(
- SINP, Moscow
)
,
Ying-li Zhang
(
- Kyoto U., Yukawa Inst., Kyoto
)

Feb 18, 2013

28 pages

Published in:

JCAP 07 (2013) 034

e-Print:

1302.4330 [hep-th]

DOI:

10.1088/1475-7516/2013/07/034

Report number:

YITP-12-13,
YITP-13-13

View in:

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Abstract: (IOP)

A nonlocal gravity model which does not assume theexistence of a new dimensional parameter in the action and includesa function f(−1R), with the d'Alembertian operator,is studied. By specifying an exponential form for the function fand including a matter sector with a constant equation of stateparameter, all available power-law solutions in the Jordan frame areobtained. New power-law solutions in the Einstein frame are alsoprobed. Furthermore, the relationship between power-law solutions inboth frames, established through conformal transformation, issubstantially clarified. The correspondence between power-lawsolutions in these two frames is proven to be a very useful tool inorder to obtain new solutions in the Einstein frame.

Note:

35 pages, uses jcappub.sty, v2: Sections 3.6 and 4 added, references added

modied gravity
dark energy theory
model: nonlocal
transformation: conformal
gravitation: nonlocal
gravitation: model
equation of state
Jordan
fluid

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Figures(0)

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