Dynamically assisted pair production for various polarizations
Electron-positron pair production in dynamically assisted two-color electric fields is investigated for various polarizations. Momentum spectrum and number density of the created pairs are examined carefully, in particular, the effects of polarization and high harmonics of two-color fields are exhib...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-03-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269320300630 |
| _version_ | 1819110877273522176 |
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| author | O. Olugh Z.L. Li B.S. Xie |
| author_facet | O. Olugh Z.L. Li B.S. Xie |
| author_sort | O. Olugh |
| collection | DOAJ |
| description | Electron-positron pair production in dynamically assisted two-color electric fields is investigated for various polarizations. Momentum spectrum and number density of the created pairs are examined carefully, in particular, the effects of polarization and high harmonics of two-color fields are exhibited. For only single strong field, the interference effects of momentum spectrum would be vanished when polarization is high, however, for the dynamical assisted two-color fields, the interference effects would be more and more remarkable with polarization. The multiple peaks of momentum spectrum in elliptic or/and circular polarization are observed and explained. It is found that there exists a strong nonlinear dependence of the number density on the high harmonics of two-color fields. Specially the number density can be enhanced significantly over 7−8 orders when appropriate high harmonics is present. Another interesting finding is that the polarization effect on number density is gradually weakened as the high harmonics increases, however, a weak nonlinearity relation appears again if the high harmonics exceeds a single-photon threshold. |
| first_indexed | 2024-12-22T03:48:42Z |
| format | Article |
| id | doaj.art-4e34577c26da40a2ab8ea6bfe9f23154 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-22T03:48:42Z |
| publishDate | 2020-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-4e34577c26da40a2ab8ea6bfe9f231542022-12-21T18:40:04ZengElsevierPhysics Letters B0370-26932020-03-01802Dynamically assisted pair production for various polarizationsO. Olugh0Z.L. Li1B.S. Xie2Key Laboratory of Beam Technology of the Ministry of Education, and College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, ChinaSchool of Science, China University of Mining and Technology, Beijing 100083, ChinaKey Laboratory of Beam Technology of the Ministry of Education, and College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China; Beijing Radiation Center, Beijing 100875, China; Corresponding author at: Key Laboratory of Beam Technology of the Ministry of Education, and College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China.Electron-positron pair production in dynamically assisted two-color electric fields is investigated for various polarizations. Momentum spectrum and number density of the created pairs are examined carefully, in particular, the effects of polarization and high harmonics of two-color fields are exhibited. For only single strong field, the interference effects of momentum spectrum would be vanished when polarization is high, however, for the dynamical assisted two-color fields, the interference effects would be more and more remarkable with polarization. The multiple peaks of momentum spectrum in elliptic or/and circular polarization are observed and explained. It is found that there exists a strong nonlinear dependence of the number density on the high harmonics of two-color fields. Specially the number density can be enhanced significantly over 7−8 orders when appropriate high harmonics is present. Another interesting finding is that the polarization effect on number density is gradually weakened as the high harmonics increases, however, a weak nonlinearity relation appears again if the high harmonics exceeds a single-photon threshold.http://www.sciencedirect.com/science/article/pii/S0370269320300630 |
| spellingShingle | O. Olugh Z.L. Li B.S. Xie Dynamically assisted pair production for various polarizations Physics Letters B |
| title | Dynamically assisted pair production for various polarizations |
| title_full | Dynamically assisted pair production for various polarizations |
| title_fullStr | Dynamically assisted pair production for various polarizations |
| title_full_unstemmed | Dynamically assisted pair production for various polarizations |
| title_short | Dynamically assisted pair production for various polarizations |
| title_sort | dynamically assisted pair production for various polarizations |
| url | http://www.sciencedirect.com/science/article/pii/S0370269320300630 |
| work_keys_str_mv | AT oolugh dynamicallyassistedpairproductionforvariouspolarizations AT zlli dynamicallyassistedpairproductionforvariouspolarizations AT bsxie dynamicallyassistedpairproductionforvariouspolarizations |