Gravitational waves from oscillon preheating
Oscillons are long-lived, localized excitations of nonlinear scalar fields which may be copiously produced during preheating after inflation, leading to a possible oscillon-dominated phase in the early Universe. For example, this can happen after axion monodromy inflation, on which we run our simula...
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| Format: | Article |
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Springer
2013
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| Online Access: | https://eprints.nottingham.ac.uk/42150/ |
| _version_ | 1848796432310468608 |
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| author | Zhou, Shuang-Yong Copeland, Edmund J. Easther, Richard Finkel, Hal Mou, Zong-Gang Saffin, Paul M. |
| author_facet | Zhou, Shuang-Yong Copeland, Edmund J. Easther, Richard Finkel, Hal Mou, Zong-Gang Saffin, Paul M. |
| author_sort | Zhou, Shuang-Yong |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Oscillons are long-lived, localized excitations of nonlinear scalar fields which may be copiously produced during preheating after inflation, leading to a possible oscillon-dominated phase in the early Universe. For example, this can happen after axion monodromy inflation, on which we run our simulations. We investigate the stochastic gravitational wave background associated with an oscillon-dominated phase. An isolated oscillon is spherically symmetric and does not radiate gravitational waves, and we show that the flux of gravitational radiation generated between oscillons is also small. However, a significant stochastic gravitational wave background may be generated during preheating itself (i.e, when oscillons are forming), and in this case the characteristic size of the oscillons is imprinted on the gravitational wave power spectrum, which has multiple, distinct peaks. |
| first_indexed | 2025-11-14T19:47:53Z |
| format | Article |
| id | nottingham-42150 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:47:53Z |
| publishDate | 2013 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-421502020-05-04T16:39:30Z https://eprints.nottingham.ac.uk/42150/ Gravitational waves from oscillon preheating Zhou, Shuang-Yong Copeland, Edmund J. Easther, Richard Finkel, Hal Mou, Zong-Gang Saffin, Paul M. Oscillons are long-lived, localized excitations of nonlinear scalar fields which may be copiously produced during preheating after inflation, leading to a possible oscillon-dominated phase in the early Universe. For example, this can happen after axion monodromy inflation, on which we run our simulations. We investigate the stochastic gravitational wave background associated with an oscillon-dominated phase. An isolated oscillon is spherically symmetric and does not radiate gravitational waves, and we show that the flux of gravitational radiation generated between oscillons is also small. However, a significant stochastic gravitational wave background may be generated during preheating itself (i.e, when oscillons are forming), and in this case the characteristic size of the oscillons is imprinted on the gravitational wave power spectrum, which has multiple, distinct peaks. Springer 2013-10-03 Article PeerReviewed Zhou, Shuang-Yong, Copeland, Edmund J., Easther, Richard, Finkel, Hal, Mou, Zong-Gang and Saffin, Paul M. (2013) Gravitational waves from oscillon preheating. Journal of High Energy Physics, 2013 . 26/1-26/18. ISSN 1029-8479 Cosmology of Theories beyond the SM Solitons Monopoles and Instantons Nonperturbative Effects http://link.springer.com/article/10.1007%2FJHEP10%282013%29026 doi:10.1007/JHEP10(2013)026 doi:10.1007/JHEP10(2013)026 |
| spellingShingle | Cosmology of Theories beyond the SM Solitons Monopoles and Instantons Nonperturbative Effects Zhou, Shuang-Yong Copeland, Edmund J. Easther, Richard Finkel, Hal Mou, Zong-Gang Saffin, Paul M. Gravitational waves from oscillon preheating |
| title | Gravitational waves from oscillon preheating |
| title_full | Gravitational waves from oscillon preheating |
| title_fullStr | Gravitational waves from oscillon preheating |
| title_full_unstemmed | Gravitational waves from oscillon preheating |
| title_short | Gravitational waves from oscillon preheating |
| title_sort | gravitational waves from oscillon preheating |
| topic | Cosmology of Theories beyond the SM Solitons Monopoles and Instantons Nonperturbative Effects |
| url | https://eprints.nottingham.ac.uk/42150/ https://eprints.nottingham.ac.uk/42150/ https://eprints.nottingham.ac.uk/42150/ |