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

Abdukerim Nuriman^{1, 2}, Li Zi-Liang^{1, 3}, Xie Bai-Song^{1, 4, †}

(color online) Electron–positron number density versus the original two-frequency ratio in two-color pulse laser field with a relative large chirping for b₂ and the chirping of b₁ is either absent or small still.