Enhanced electron-positron pair production by frequency chirping in one- and two-color laser pulse fields

doi:10.1088/1674-1056/26/2/020301

中国物理B ›› 2017, Vol. 26 ›› Issue (2): 20301-020301.doi: 10.1088/1674-1056/26/2/020301

Enhanced electron-positron pair production by frequency chirping in one- and two-color laser pulse fields

Nuriman Abdukerim, Zi-Liang Li(李子良), Bai-Song Xie(谢柏松)

1 College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
2 School of Physics and Technology, Xinjiang University, Urumqi 830046, China;
3 School of Science, China University of Mining and Technology, Beijing 100083, China;
4 Beijing Radiation Center, Beijing 100875, China

收稿日期:2016-09-02 修回日期:2016-11-15 出版日期:2017-02-05 发布日期:2017-02-05
通讯作者: Bai-Song Xie E-mail:bsxie@bnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11475026 and 11175023).

Enhanced electron-positron pair production by frequency chirping in one- and two-color laser pulse fields

Nuriman Abdukerim^1,2, Zi-Liang Li(李子良)^1,3, Bai-Song Xie(谢柏松)^1,4

1 College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
2 School of Physics and Technology, Xinjiang University, Urumqi 830046, China;
3 School of Science, China University of Mining and Technology, Beijing 100083, China;
4 Beijing Radiation Center, Beijing 100875, China

Received:2016-09-02 Revised:2016-11-15 Online:2017-02-05 Published:2017-02-05
Contact: Bai-Song Xie E-mail:bsxie@bnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11475026 and 11175023).

摘要/Abstract

摘要： Enhanced electron-positron pair production by frequency chirping in one- and two-color laser pulse fields is investigated by solving the quantum Vlasov equation. A small frequency chirp shifts the momentum spectrum along the momentum axis. The positive and negative frequency chirp parameters play the same role in increasing the pair number density. The sign change of the frequency chirp parameter at the moment t=0 leads the pulse shape and momentum spectrum to be symmetric, and the number density to be increased. The number density of produced pairs in the two-color pulse field is much higher than that in the one-color pulse field and the larger frequency chirp pulse field dominates more strongly. In the two-color pulse fields, the relation between the frequency ratio of two colors and the number density is not sensitive to the parameters of small frequency chirp added in either a low frequency strong field or a high frequency weak field but sensitive to the parameters of large frequency chirp added in a high frequency weak field.

关键词: electron-positron, quantum nonlocalization, quantum Vlasov equation, frequency chirping

Abstract: Enhanced electron-positron pair production by frequency chirping in one- and two-color laser pulse fields is investigated by solving the quantum Vlasov equation. A small frequency chirp shifts the momentum spectrum along the momentum axis. The positive and negative frequency chirp parameters play the same role in increasing the pair number density. The sign change of the frequency chirp parameter at the moment t=0 leads the pulse shape and momentum spectrum to be symmetric, and the number density to be increased. The number density of produced pairs in the two-color pulse field is much higher than that in the one-color pulse field and the larger frequency chirp pulse field dominates more strongly. In the two-color pulse fields, the relation between the frequency ratio of two colors and the number density is not sensitive to the parameters of small frequency chirp added in either a low frequency strong field or a high frequency weak field but sensitive to the parameters of large frequency chirp added in a high frequency weak field.

Key words: electron-positron, quantum nonlocalization, quantum Vlasov equation, frequency chirping

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

05.30.-d (Quantum statistical mechanics) 42.55.Vc (X- and γ-ray lasers)

Nuriman Abdukerim, 李子良, 谢柏松. Enhanced electron-positron pair production by frequency chirping in one- and two-color laser pulse fields[J]. 中国物理B, 2017, 26(2): 20301-020301.

Nuriman Abdukerim, Zi-Liang Li(李子良), Bai-Song Xie(谢柏松). Enhanced electron-positron pair production by frequency chirping in one- and two-color laser pulse fields[J]. Chin. Phys. B, 2017, 26(2): 20301-020301.

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Enhanced electron-positron pair production by frequency chirping in one- and two-color laser pulse fields

Enhanced electron-positron pair production by frequency chirping in one- and two-color laser pulse fields

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