Details
| Original language | English |
|---|---|
| Article number | 398 |
| Journal | Universe |
| Volume | 7 |
| Issue number | 11 |
| Publication status | Published - 21 Oct 2021 |
| Externally published | Yes |
Abstract
We provide a review on the state-of-the-art of gravitational waves induced by primordial fluctuations, so-called induced gravitational waves. We present the intuitive physics behind induced gravitational waves and we revisit and unify the general analytical formulation. We then present general formulas in a compact form, ready to be applied. This review places emphasis on the open possibility that the primordial universe experienced a different expansion history than the often assumed radiation dominated cosmology. We hope that anyone interested in the topic will become aware of current advances in the cosmology of induced gravitational waves, as well as becoming familiar with the calculations behind.
Keywords
- Early universe, Induced gravitational waves, Inflation, Primordial black holes
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Universe, Vol. 7, No. 11, 398, 21.10.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Scalar Induced Gravitational Waves Review
AU - Domènech, Guillem
N1 - Publisher Copyright: © 2021 by the author. Licensee MDPI, Basel, Switzerland.
PY - 2021/10/21
Y1 - 2021/10/21
N2 - We provide a review on the state-of-the-art of gravitational waves induced by primordial fluctuations, so-called induced gravitational waves. We present the intuitive physics behind induced gravitational waves and we revisit and unify the general analytical formulation. We then present general formulas in a compact form, ready to be applied. This review places emphasis on the open possibility that the primordial universe experienced a different expansion history than the often assumed radiation dominated cosmology. We hope that anyone interested in the topic will become aware of current advances in the cosmology of induced gravitational waves, as well as becoming familiar with the calculations behind.
AB - We provide a review on the state-of-the-art of gravitational waves induced by primordial fluctuations, so-called induced gravitational waves. We present the intuitive physics behind induced gravitational waves and we revisit and unify the general analytical formulation. We then present general formulas in a compact form, ready to be applied. This review places emphasis on the open possibility that the primordial universe experienced a different expansion history than the often assumed radiation dominated cosmology. We hope that anyone interested in the topic will become aware of current advances in the cosmology of induced gravitational waves, as well as becoming familiar with the calculations behind.
KW - Early universe
KW - Induced gravitational waves
KW - Inflation
KW - Primordial black holes
UR - http://www.scopus.com/inward/record.url?scp=85119208823&partnerID=8YFLogxK
U2 - 10.3390/universe7110398
DO - 10.3390/universe7110398
M3 - Article
VL - 7
JO - Universe
JF - Universe
IS - 11
M1 - 398
ER -