Generation of the large scale magnetic fields by coupling to curvature and dilaton field
We investigate the generation of large scale magnetic fields in the universe from quantum fluctuations that are produced in the inflationary stage. By coupling these quantum fluctuations to the dilaton field and Ricci scalar, we show that the magnetic fields with the strength observed today can be p...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Isfahan University of Technology
2006-06-01
|
| Series: | Iranian Journal of Physics Research |
| Subjects: | |
| Online Access: | http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-41&slc_lang=en&sid=1 |
| _version_ | 1818235736577540096 |
|---|---|
| author | A. Akhtari Zavareh B. Mirza A. Hojjati |
| author_facet | A. Akhtari Zavareh B. Mirza A. Hojjati |
| author_sort | A. Akhtari Zavareh |
| collection | DOAJ |
| description | We investigate the generation of large scale magnetic fields in the universe from quantum fluctuations that are produced in the inflationary stage. By coupling these quantum fluctuations to the dilaton field and Ricci scalar, we show that the magnetic fields with the strength observed today can be produced. We consider two situations. First, the evolution of dilaton ends by starting the reheating stage. Second, the dilaton continues its evolution after reheating and then decays. We here consider the first case. In both cases, we come back to the usual Maxwell equations after inflation and then calculate present magnetic fields. |
| first_indexed | 2024-12-12T11:58:43Z |
| format | Article |
| id | doaj.art-4dc1603d0cbb44e8a6bb43a67fea37c8 |
| institution | Directory Open Access Journal |
| issn | 1682-6957 |
| language | English |
| last_indexed | 2024-12-12T11:58:43Z |
| publishDate | 2006-06-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Iranian Journal of Physics Research |
| spelling | doaj.art-4dc1603d0cbb44e8a6bb43a67fea37c82022-12-22T00:25:08ZengIsfahan University of TechnologyIranian Journal of Physics Research1682-69572006-06-01626776Generation of the large scale magnetic fields by coupling to curvature and dilaton fieldA. Akhtari ZavarehB. MirzaA. HojjatiWe investigate the generation of large scale magnetic fields in the universe from quantum fluctuations that are produced in the inflationary stage. By coupling these quantum fluctuations to the dilaton field and Ricci scalar, we show that the magnetic fields with the strength observed today can be produced. We consider two situations. First, the evolution of dilaton ends by starting the reheating stage. Second, the dilaton continues its evolution after reheating and then decays. We here consider the first case. In both cases, we come back to the usual Maxwell equations after inflation and then calculate present magnetic fields.http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-41&slc_lang=en&sid=1large scalemagnetic fieldsinflation |
| spellingShingle | A. Akhtari Zavareh B. Mirza A. Hojjati Generation of the large scale magnetic fields by coupling to curvature and dilaton field Iranian Journal of Physics Research large scale magnetic fields inflation |
| title | Generation of the large scale magnetic fields by coupling to curvature and dilaton field |
| title_full | Generation of the large scale magnetic fields by coupling to curvature and dilaton field |
| title_fullStr | Generation of the large scale magnetic fields by coupling to curvature and dilaton field |
| title_full_unstemmed | Generation of the large scale magnetic fields by coupling to curvature and dilaton field |
| title_short | Generation of the large scale magnetic fields by coupling to curvature and dilaton field |
| title_sort | generation of the large scale magnetic fields by coupling to curvature and dilaton field |
| topic | large scale magnetic fields inflation |
| url | http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-41&slc_lang=en&sid=1 |
| work_keys_str_mv | AT aakhtarizavareh generationofthelargescalemagneticfieldsbycouplingtocurvatureanddilatonfield AT bmirza generationofthelargescalemagneticfieldsbycouplingtocurvatureanddilatonfield AT ahojjati generationofthelargescalemagneticfieldsbycouplingtocurvatureanddilatonfield |