Effect of symmetrical frequency chirp on pair production
- URL: http://arxiv.org/abs/2103.00389v1
- Date: Sun, 28 Feb 2021 03:41:02 GMT
- Title: Effect of symmetrical frequency chirp on pair production
- Authors: Kun Wang, Xuehua Hu, Sayipjamal Dulat and B. S. Xie
- Abstract summary: We study pair production for linear, elliptic, nearly circular and circular polarizations of electric fields with symmetrical frequency chirp.
The difference of results among polarized fields is obvious for the small chirp.
The increase of number density is also remarkable compared to the case of asymmetrical frequency chirp.
- Score: 4.521847882428414
- License: http://creativecommons.org/licenses/by/4.0/
- 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 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.
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