Flat-top oscillons in an expanding universe
Oscillons are extremely long lived, oscillatory, spatially localized field configurations that arise from generic initial conditions in a large number of nonlinear field theories. With an eye towards their cosmological implications, we investigate their properties in an expanding universe. We (1) pr...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/57492 |
| _version_ | 1811095120726982656 |
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| author | Amin, Mustafa Abdulkader Shirokoff, David George |
| author2 | Massachusetts Institute of Technology. Department of Mathematics |
| author_facet | Massachusetts Institute of Technology. Department of Mathematics Amin, Mustafa Abdulkader Shirokoff, David George |
| author_sort | Amin, Mustafa Abdulkader |
| collection | MIT |
| description | Oscillons are extremely long lived, oscillatory, spatially localized field configurations that arise from generic initial conditions in a large number of nonlinear field theories. With an eye towards their cosmological implications, we investigate their properties in an expanding universe. We (1) provide an analytic solution for one-dimensional oscillons (for the models under consideration) and discuss their generalization to three dimensions, (2) discuss their stability against long wavelength perturbations, and (3) estimate the effects of expansion on their shapes and lifetimes. In particular, we discuss a new, extended class of oscillons with surprisingly flat tops. We show that these flat-topped oscillons are more robust against collapse instabilities in (3+1) dimensions than their usual counterparts. Unlike the solutions found in the small amplitude analysis, the width of these configurations is a nonmonotonic function of their amplitudes. |
| first_indexed | 2024-09-23T16:10:58Z |
| format | Article |
| id | mit-1721.1/57492 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:10:58Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/574922022-09-29T18:48:43Z Flat-top oscillons in an expanding universe Amin, Mustafa Abdulkader Shirokoff, David George Massachusetts Institute of Technology. Department of Mathematics Massachusetts Institute of Technology. Department of Physics Amin, Mustafa Abdulkader Amin, Mustafa Abdulkader Shirokoff, David George Oscillons are extremely long lived, oscillatory, spatially localized field configurations that arise from generic initial conditions in a large number of nonlinear field theories. With an eye towards their cosmological implications, we investigate their properties in an expanding universe. We (1) provide an analytic solution for one-dimensional oscillons (for the models under consideration) and discuss their generalization to three dimensions, (2) discuss their stability against long wavelength perturbations, and (3) estimate the effects of expansion on their shapes and lifetimes. In particular, we discuss a new, extended class of oscillons with surprisingly flat tops. We show that these flat-topped oscillons are more robust against collapse instabilities in (3+1) dimensions than their usual counterparts. Unlike the solutions found in the small amplitude analysis, the width of these configurations is a nonmonotonic function of their amplitudes. 2010-08-12T15:20:09Z 2010-08-12T15:20:09Z 2010-04 2010-02 Article http://purl.org/eprint/type/JournalArticle 1550-7998 http://hdl.handle.net/1721.1/57492 Amin, Mustafa A., and David Shirokoff. “Flat-top oscillons in an expanding universe.” Physical Review D 81.8 (2010): 085045.© 2010 The American Physical Society. en_US http://dx.doi.org/10.1103/PhysRevD.81.085045 Physical Review D 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 Shirokoff, David George Flat-top oscillons in an expanding universe |
| title | Flat-top oscillons in an expanding universe |
| title_full | Flat-top oscillons in an expanding universe |
| title_fullStr | Flat-top oscillons in an expanding universe |
| title_full_unstemmed | Flat-top oscillons in an expanding universe |
| title_short | Flat-top oscillons in an expanding universe |
| title_sort | flat top oscillons in an expanding universe |
| url | http://hdl.handle.net/1721.1/57492 |
| work_keys_str_mv | AT aminmustafaabdulkader flattoposcillonsinanexpandinguniverse AT shirokoffdavidgeorge flattoposcillonsinanexpandinguniverse |