Schwinger pair production in inhomogeneous electric fields with symmetrical frequency chirp

Pair production in inhomogeneous electric fields with symmetrical frequency chirp is studied numerically using the Dirac-Heisenberg-Wigner formalism. We investigate high- and low-frequency modes consider two carrier envelope phases. Momentum spectrum sensitive to causing different interference effect for spatial scales as well phase of external field. The reduced particle number general enhanced increasing chirp. scale field on also examined. It found that it at small but almost unchangeable large considered parameters. On other hand, scale, by one or orders when applied exception cosine which only a few times larger. Moreover further increased about comparing usual asymmetrical high