Pair Production Beyond the Schwinger Formula in Time-Dependent Electric Fields

Details Pair Production Beyond the Schwinger Formula in Time-Dependent Electric Fields Pair Production Beyond the Schwinger Formula in Time-Dependent Electric Fields

2008-07-17

arxiv.org/abs/0807.2785v3

Phys.Rev.D78:061701,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 3 figures. Typos corrected and references added, PRD Version

Scientific paper

10.1103/PhysRevD.78.061701

We investigate electron-positron pair production in pulse-shaped electric background fields using a non-Markovian quantum kinetic equation. We identify a pulse-length range for subcritical fields still in the nonperturbative regime where the number of produced pairs significantly exceeds that of a naive expectation based on the Schwinger formula. From a conceptual viewpoint, we find a remarkable quantitative agreement between the (real-time) quantum kinetic approach and the (imaginary-time) effective action approach.

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