Filling gap of combination of gauge and analytical method in KFR-like theory

Li Jian^{1, 2, †}, Ma Feng-Cai^{3, ‡}

Photoelectron energy spectra from Keldysh’s theory, proposed formula, Reiss’ theory, and Bauer’s theory at (a) ω = 0.01 a.u., F = 0.05 a.u., and γ = 0.2; (b) ω = 0.01 a.u., F = 0.03 a.u., and γ = 0.33; (c) ω = 0.02 a.u., F = 0.06 a.u., and γ = 0.33; (d) ω = 0.25 a.u., F = 0.75 a.u., and γ = 0.33.