Details
| Original language | English |
|---|---|
| Article number | 1645006 |
| Journal | International Journal of Modern Physics D |
| Volume | 25 |
| Issue number | 13 |
| Publication status | Published - 2016 |
| Externally published | Yes |
Abstract
From higher dimensional theories, e.g. string theory, one expects the presence of nonminimally coupled scalar fields. We review the notion of conformal frames in cosmology and emphasize their physical equivalence, which holds at least at a classical level. Furthermore, if there is a field, or fields, which dominates the universe, as it is often the case in cosmology, we can use such notion of frames to treat our system, matter and gravity, as two different sectors. On one hand, the gravity sector which describes the dynamics of the geometry and on the other hand, the matter sector which has such geometry as a playground. We use this interpretation to build a model where the fact that a curvaton couples to a particular frame metric could leave an imprint in the cosmic microwave background (CMB).
Keywords
- Cosmology, inflation, scalar-tensor theory
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Astronomy and Astrophysics
- Mathematics(all)
- Mathematical Physics
- Earth and Planetary Sciences(all)
- Space and Planetary Science
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In: International Journal of Modern Physics D, Vol. 25, No. 13, 1645006, 2016.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Conformal frames in cosmology
AU - Domènech Fuertes, Guillem
N1 - Publisher Copyright: © 2016 World Scientific Publishing Company.
PY - 2016
Y1 - 2016
N2 - From higher dimensional theories, e.g. string theory, one expects the presence of nonminimally coupled scalar fields. We review the notion of conformal frames in cosmology and emphasize their physical equivalence, which holds at least at a classical level. Furthermore, if there is a field, or fields, which dominates the universe, as it is often the case in cosmology, we can use such notion of frames to treat our system, matter and gravity, as two different sectors. On one hand, the gravity sector which describes the dynamics of the geometry and on the other hand, the matter sector which has such geometry as a playground. We use this interpretation to build a model where the fact that a curvaton couples to a particular frame metric could leave an imprint in the cosmic microwave background (CMB).
AB - From higher dimensional theories, e.g. string theory, one expects the presence of nonminimally coupled scalar fields. We review the notion of conformal frames in cosmology and emphasize their physical equivalence, which holds at least at a classical level. Furthermore, if there is a field, or fields, which dominates the universe, as it is often the case in cosmology, we can use such notion of frames to treat our system, matter and gravity, as two different sectors. On one hand, the gravity sector which describes the dynamics of the geometry and on the other hand, the matter sector which has such geometry as a playground. We use this interpretation to build a model where the fact that a curvaton couples to a particular frame metric could leave an imprint in the cosmic microwave background (CMB).
KW - Cosmology
KW - inflation
KW - scalar-tensor theory
UR - http://www.scopus.com/inward/record.url?scp=84978759645&partnerID=8YFLogxK
U2 - 10.1142/S0218271816450061
DO - 10.1142/S0218271816450061
M3 - Article
VL - 25
JO - International Journal of Modern Physics D
JF - International Journal of Modern Physics D
SN - 0218-2718
IS - 13
M1 - 1645006
ER -