Effect of symmetrical frequency chirp on pair production

doi:10.1088/1674-1056/abeee8

中国物理B ›› 2021, Vol. 30 ›› Issue (6): 60204-060204.doi: 10.1088/1674-1056/abeee8

Effect of symmetrical frequency chirp on pair production

Kun Wang(王焜)¹, Xuehua Hu(胡学华)¹, Sayipjamal Dulat^1,†, and Bai-Song Xie(谢柏松)^2,3,‡

1 School of Physics and Technology, Xinjiang University, Urumqi 830046, China;
2 Key Laboratory of Beam Technology of the Ministry of Education, and College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
3 Beijing Radiation Center, Beijing 100875, China

收稿日期:2020-12-31 修回日期:2021-02-23 接受日期:2021-03-16 出版日期:2021-05-18 发布日期:2021-06-01
通讯作者: Sayipjamal Dulat, Bai-Song Xie E-mail:sdulat@msu.edu;bsxie@bnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11875007, 11935008, and 11965020).

Effect of symmetrical frequency chirp on pair production

Kun Wang(王焜)¹, Xuehua Hu(胡学华)¹, Sayipjamal Dulat^1,†, and Bai-Song Xie(谢柏松)^2,3,‡

1 School of Physics and Technology, Xinjiang University, Urumqi 830046, China;
2 Key Laboratory of Beam Technology of the Ministry of Education, and College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
3 Beijing Radiation Center, Beijing 100875, China

Received:2020-12-31 Revised:2021-02-23 Accepted:2021-03-16 Online:2021-05-18 Published:2021-06-01
Contact: Sayipjamal Dulat, Bai-Song Xie E-mail:sdulat@msu.edu;bsxie@bnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11875007, 11935008, and 11965020).

摘要/Abstract

摘要： By using Dirac-Heisenberg-Wigner formalism we study electron-positron pair production for linear, elliptic, nearly circular, and circular polarizations of electric fields with symmetrical frequency chirp, and we obtain momentum spectra and pair yield. The difference of results among polarized fields is obvious for the small chirp. When the chirp parameter increases, the momentum spectra tend to exhibit the multiphoton pair generation that is characterized by the multi-concentric ring structure. The increase of the number density is also remarkable compared to the case of asymmetrical frequency chirp. Note that the dynamically assisted Schwinger mechanism plays an important role for the enhanced pair production in the symmetrical frequency chirp.

关键词: pair production, Dirac-Heisenberg-Wigner formalism, symmetrical frequency chirp

Abstract: By using Dirac-Heisenberg-Wigner formalism we study electron-positron pair production for linear, elliptic, nearly circular, and circular polarizations of electric fields with symmetrical frequency chirp, and we obtain momentum spectra and pair yield. The difference of results among polarized fields is obvious for the small chirp. When the chirp parameter increases, the momentum spectra tend to exhibit the multiphoton pair generation that is characterized by the multi-concentric ring structure. The increase of the number density is also remarkable compared to the case of asymmetrical frequency chirp. Note that the dynamically assisted Schwinger mechanism plays an important role for the enhanced pair production in the symmetrical frequency chirp.

Key words: pair production, Dirac-Heisenberg-Wigner formalism, symmetrical frequency chirp

中图分类号: (Numerical approximation and analysis)

02.60.-x

12.20.Ds (Specific calculations) 03.65.Pm (Relativistic wave equations)

Kun Wang(王焜), Xuehua Hu(胡学华), Sayipjamal Dulat, and Bai-Song Xie(谢柏松). Effect of symmetrical frequency chirp on pair production[J]. 中国物理B, 2021, 30(6): 60204-060204.

Kun Wang(王焜), Xuehua Hu(胡学华), Sayipjamal Dulat, and Bai-Song Xie(谢柏松). Effect of symmetrical frequency chirp on pair production[J]. Chin. Phys. B, 2021, 30(6): 60204-060204.

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Effect of symmetrical frequency chirp on pair production

Effect of symmetrical frequency chirp on pair production

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