Reheating after swampland conjecture
- PDF / 318,464 Bytes
- 10 Pages / 595.276 x 841.89 pts (A4) Page_size
- 77 Downloads / 206 Views
Springer
Received: October Revised: December Accepted: December Published: January
25, 16, 29, 16,
2019 2019 2019 2020
Reheating after swampland conjecture
Department of Physics, McGill University, Montreal, QC, H3A 2T8, Canada Department of Physics, Bu-Ali Sina (Avicenna) University, Hamedan 65178, 016016, Iran School of Physics, Institute for Research in Fundamental Sciences (IPM), 19538-33511, Tehran, Iran
E-mail: [email protected] Abstract: The evolution of the universe started from a hot and dense Big Bang point. Temperature fluctuation map of cosmic microwave background (CMB) radiation and initial seeds of large scale structures (LSS) are explained by an inflationary period in a very early time. Inflaton as quanta of the inflation field is responsible for the accelerated expansion of the universe. Potentials of the self-interacting single field models are constrained by observational data as well as quantum gravity. Some forms of the potential are rolled out by data of Planck satellite and some of them by quantum gravity constraints. In the standard model of inflation or cold inflation firstly universe expands where the inflaton rolls the nearly flat part of the potential and in the second part, the universe reheats where the inflaton oscillates around the minimum of the potential which leads to thermalized radiation dominated universe. String theory as the best model of quantum gravity forbids the oscillation around the minimum of the potential during the thermalized epoch of the reheating. But in the warm model of inflation thermalization happens during the accelerated expansion of the universe where the inflaton rolls nearly steep potential and the universe will be radiation dominated without any separated reheating epoch. Keywords: Cosmology of Theories beyond the SM, Effective Field Theories ArXiv ePrint: 1902.00701
c The Authors. Open Access, Article funded by SCOAP3 .
https://doi.org/10.1007/JHEP01(2020)092
JHEP01(2020)092
Vahid Kamali
Contents 1
2 The swampland conjecture
2
3 Thermal field theory and phase transitions
2
4 Reheating
4
5 Discussion and conclusions
5
1
Motivation
Big Bang (BB) model is originally introduced based on the expansion of the galaxies(clusters). This model has a famous contradiction with the background temperature of the CMB observational data which is known as horizon problem. This problem can be resolved by an inflation scenario which introduces an accelerated expansion period of the universe evolution in early time. The idea of inflation was proposed in the context of quantum field theory (QFT) [1–3]. Other more interesting features of the inflation are the explanation of the initial seed of LSS formation and CMB temperature anisotropy which are studied in the context of cosmological perturbation theory [4]. The standard cold model of inflation [2], in term of second-order phase transition, is described by two main parts, first part is the accelerated expansion of the universe which is presented by inflaton field, rolling slowly, and the second part is t
Data Loading...
