137 research outputs found
Dynamically assisted Sauter-Schwinger effect in inhomogeneous electric fields
Via the worldline instanton method, we study electron-positron pair creation
by a strong electric field of the profile superimposed by a
weaker pulse . If the temporal Keldysh parameter
exceeds a threshold value which depends on the spatial Keldysh parameter , we
find a drastic enhancement of the pair creation probability -- reporting on
what we believe to be the first analytic non-perturbative result for the
interplay between temporal and spatial field dependences in the
Sauter-Schwinger effect.Comment: 13 pages, 4 figure
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