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Chirped dynamically assisted pair production in spatial inhomogeneouselectric fields is studied by the Dirac-Heisenberg-Wigner formalism. Theeffects of the chirp parameter on the reduced momentum spectrum, the reducedtotal yield of the created pairs for either low or high frequency one-colorfield and two-color dynamically assisted combinational fields are investigatedin detail. Also, the enhancement factor is obtained in the later two-colorfield case. It is found that for the low frequency field, no matter whether itis accompanied by the other high frequency field, its chirping has a littleeffect on the pair production. For the one-color high frequency field or/andtwo-color fields, the momentum spectrum exhibits incomplete interference andthe interference effect becomes more and more remarkable as chirp increases. Wealso find that in the chirped dynamically assisted field, the reduced totalyield is enhanced significantly when the chirps are acting on the two fields,compared with that the chirp is acting only for the low frequency strong field.Specifically, by the chirping, it is found the reduced pair number is increasedby more than one order of magnitude in the field with a relative narrow spatialscale, while it is enhanced at least two times in other case of field withlarger spatial scales or even in the quasi-homogeneous region. We also obtainsome optimal chirp parameters and spatial scales for the total yield andenhancement factor in different scenarios of the studied external field. Theseresults may provide a theoretical basis for possible experiments in the future.

Enhanced dynamically assisted pair production in spatial inhomogeneous electric fields with the frequency chirping