The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe
It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. While the abundance of light elements indicates that the Universe was radiation dominated during Big Bang Nucleosynthesis...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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The Open Journal
2021
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| Online Access: | https://hdl.handle.net/1721.1/134155 |
| _version_ | 1826210054551896064 |
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| author | Allahverdi, Rouzbeh Amin, Mustafa A Berlin, Asher Bernal, Nicholas Byrnes, Christian T Delos, M Sten Erickcek, Adrienne L Escudero, Miguel Figueroa, Daniel G Freese, Katherine Harada, Tomohiro Hooper, Dan Kaiser, David I Karwal, Tanvi Kohri, Kazunori Krnjaci, Gordan Lewicki, Marek Lozanov, Kaloian D Poulin, Vivian Sinha, Kuver Smith, Tristan L Takahashi, Tomo Tenkanen, Tommi Unwin, James Watson, Scottname |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Allahverdi, Rouzbeh Amin, Mustafa A Berlin, Asher Bernal, Nicholas Byrnes, Christian T Delos, M Sten Erickcek, Adrienne L Escudero, Miguel Figueroa, Daniel G Freese, Katherine Harada, Tomohiro Hooper, Dan Kaiser, David I Karwal, Tanvi Kohri, Kazunori Krnjaci, Gordan Lewicki, Marek Lozanov, Kaloian D Poulin, Vivian Sinha, Kuver Smith, Tristan L Takahashi, Tomo Tenkanen, Tommi Unwin, James Watson, Scottname |
| author_sort | Allahverdi, Rouzbeh |
| collection | MIT |
| description | It is commonly assumed that the energy density of the Universe was dominated
by radiation between reheating after inflation and the onset of matter
domination 54,000 years later. While the abundance of light elements indicates
that the Universe was radiation dominated during Big Bang Nucleosynthesis
(BBN), there is scant evidence that the Universe was radiation dominated prior
to BBN. It is therefore possible that the cosmological history was more
complicated, with deviations from the standard radiation domination during the
earliest epochs. Indeed, several interesting proposals regarding various topics
such as the generation of dark matter, matter-antimatter asymmetry,
gravitational waves, primordial black holes, or microhalos during a nonstandard
expansion phase have been recently made. In this paper, we review various
possible causes and consequences of deviations from radiation domination in the
early Universe - taking place either before or after BBN - and the constraints
on them, as they have been discussed in the literature during the recent years. |
| first_indexed | 2024-09-23T14:41:05Z |
| format | Article |
| id | mit-1721.1/134155 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T14:41:05Z |
| publishDate | 2021 |
| publisher | The Open Journal |
| record_format | dspace |
| spelling | mit-1721.1/1341552024-01-03T18:13:35Z The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe Allahverdi, Rouzbeh Amin, Mustafa A Berlin, Asher Bernal, Nicholas Byrnes, Christian T Delos, M Sten Erickcek, Adrienne L Escudero, Miguel Figueroa, Daniel G Freese, Katherine Harada, Tomohiro Hooper, Dan Kaiser, David I Karwal, Tanvi Kohri, Kazunori Krnjaci, Gordan Lewicki, Marek Lozanov, Kaloian D Poulin, Vivian Sinha, Kuver Smith, Tristan L Takahashi, Tomo Tenkanen, Tommi Unwin, James Watson, Scottname Massachusetts Institute of Technology. Department of Physics It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. While the abundance of light elements indicates that the Universe was radiation dominated during Big Bang Nucleosynthesis (BBN), there is scant evidence that the Universe was radiation dominated prior to BBN. It is therefore possible that the cosmological history was more complicated, with deviations from the standard radiation domination during the earliest epochs. Indeed, several interesting proposals regarding various topics such as the generation of dark matter, matter-antimatter asymmetry, gravitational waves, primordial black holes, or microhalos during a nonstandard expansion phase have been recently made. In this paper, we review various possible causes and consequences of deviations from radiation domination in the early Universe - taking place either before or after BBN - and the constraints on them, as they have been discussed in the literature during the recent years. 2021-10-27T19:58:23Z 2021-10-27T19:58:23Z 2021 2021-07-12T18:55:08Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/134155 en 10.21105/astro.2006.16182 The Open Journal of Astrophysics Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf The Open Journal The Open Journal of Astrophysics |
| spellingShingle | Allahverdi, Rouzbeh Amin, Mustafa A Berlin, Asher Bernal, Nicholas Byrnes, Christian T Delos, M Sten Erickcek, Adrienne L Escudero, Miguel Figueroa, Daniel G Freese, Katherine Harada, Tomohiro Hooper, Dan Kaiser, David I Karwal, Tanvi Kohri, Kazunori Krnjaci, Gordan Lewicki, Marek Lozanov, Kaloian D Poulin, Vivian Sinha, Kuver Smith, Tristan L Takahashi, Tomo Tenkanen, Tommi Unwin, James Watson, Scottname The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe |
| title | The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe |
| title_full | The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe |
| title_fullStr | The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe |
| title_full_unstemmed | The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe |
| title_short | The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe |
| title_sort | first three seconds a review of possible expansion histories of the early universe |
| url | https://hdl.handle.net/1721.1/134155 |
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