Asymmetric pulse effects on pair production in chirped electric fields
- URL: http://arxiv.org/abs/2401.17007v1
- Date: Tue, 30 Jan 2024 13:41:08 GMT
- Title: Asymmetric pulse effects on pair production in chirped electric fields
- Authors: Neng-Zhi Chen, Orkash Amat, Li-Na Hu, Hong-Hao Fan, and Bai-Song Xie
- Abstract summary: We investigate the effects of the asymmetric pulse shapes on electron-positron pair production in three distinct fields: chirp-free, small frequency chirp, and large frequency chirp fields via the real-time Dirac-Heisenberg-Wigner formalism.
Our findings reveal the disappearance of interference effects with shorter falling pulse length, and the peak is concentrated on the left side of the momentum spectrum.
- Score: 0.3370416330484179
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We investigate the effects of the asymmetric pulse shapes on
electron-positron pair production in three distinct fields: chirp-free, small
frequency chirp, and large frequency chirp fields via the real-time
Dirac-Heisenberg-Wigner formalism. Our findings reveal the disappearance of
interference effects with shorter falling pulse length, and the peak is
concentrated on the left side of the momentum spectrum. As the falling pulse
length extends, an incomplete multi-ring structure appears in the momentum
spectrum. The number density of particles are very sensitive to the asymmetry
of the pulse. With a long falling pulse, the number density can be
significantly enhanced by over four orders of magnitude when certain frequency
chirps are utilized. These results highlight the impact of the effective
dynamically assisted mechanism and the frequency chirp on pair creation.
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