Oscillons after Inflation
Oscillons are massive, long-lived, localized excitations of a scalar field. We show that in a class of well-motivated single-field models, inflation is followed by self resonance, leading to copious oscillon generation and a lengthy period of oscillon domination. These models are characterized by an...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/72475 |
| _version_ | 1826191263576096768 |
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| author | Amin, Mustafa Abdulkader Easther, Richard Finkel, Hal Flauger, Raphael Hertzberg, Mark Peter |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Amin, Mustafa Abdulkader Easther, Richard Finkel, Hal Flauger, Raphael Hertzberg, Mark Peter |
| author_sort | Amin, Mustafa Abdulkader |
| collection | MIT |
| description | Oscillons are massive, long-lived, localized excitations of a scalar field. We show that in a class of well-motivated single-field models, inflation is followed by self resonance, leading to copious oscillon generation and a lengthy period of oscillon domination. These models are characterized by an inflaton potential which has a quadratic minimum and is shallower than quadratic away from the minimum. This set includes both string monodromy models and a class of supergravity inspired scenarios and is in good agreement with the current central values of the concordance cosmology parameters. We assume that the inflaton is weakly coupled to other fields so as not to quickly drain energy from the oscillons or prevent them from forming. An oscillon-dominated universe has a greatly enhanced primordial power spectrum on very small scales relative to that seen with a quadratic potential, possibly leading to novel gravitational effects in the early Universe. |
| first_indexed | 2024-09-23T08:53:10Z |
| format | Article |
| id | mit-1721.1/72475 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:53:10Z |
| publishDate | 2012 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/724752022-09-26T08:56:25Z Oscillons after Inflation Amin, Mustafa Abdulkader Easther, Richard Finkel, Hal Flauger, Raphael Hertzberg, Mark Peter Massachusetts Institute of Technology. Department of Physics Amin, Mustafa Amin, Mustafa Abdulkader Oscillons are massive, long-lived, localized excitations of a scalar field. We show that in a class of well-motivated single-field models, inflation is followed by self resonance, leading to copious oscillon generation and a lengthy period of oscillon domination. These models are characterized by an inflaton potential which has a quadratic minimum and is shallower than quadratic away from the minimum. This set includes both string monodromy models and a class of supergravity inspired scenarios and is in good agreement with the current central values of the concordance cosmology parameters. We assume that the inflaton is weakly coupled to other fields so as not to quickly drain energy from the oscillons or prevent them from forming. An oscillon-dominated universe has a greatly enhanced primordial power spectrum on very small scales relative to that seen with a quadratic potential, possibly leading to novel gravitational effects in the early Universe. United States. Dept. of Energy (grant no. DE-FG02-92-ER-40704) National Science Foundation (U.S.) (grant no. CAREER-PHY-0747868) United States. Dept. of Energy (award no. CSGZ-DEFG-02-97ER25308) National Science Foundation (U.S.) (grant no. PHY-0756174) 2012-08-30T16:24:04Z 2012-08-30T16:24:04Z 2012-06 2011-06 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/72475 Amin, Mustafa et al. “Oscillons After Inflation.” Physical Review Letters 108.24 (2012): 241302. © 2012 American Physical Society. en_US http://dx.doi.org/10.1103/PhysRevLett.108.241302 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Amin, Mustafa Abdulkader Easther, Richard Finkel, Hal Flauger, Raphael Hertzberg, Mark Peter Oscillons after Inflation |
| title | Oscillons after Inflation |
| title_full | Oscillons after Inflation |
| title_fullStr | Oscillons after Inflation |
| title_full_unstemmed | Oscillons after Inflation |
| title_short | Oscillons after Inflation |
| title_sort | oscillons after inflation |
| url | http://hdl.handle.net/1721.1/72475 |
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