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arXiv · 1801.07300

The effect of interference on the trident process in a constant crossed field

B. King·A. M. Fedotov
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Abstract

We perform a complete calculation of electron-seeded pair-creation (the trident process) in a constant crossed electromagnetic background. Unlike earlier treatments, we include the interference between exchange diagrams. We find this exchange interference can be written as a contribution solely to the one-step process, and for small quantum nonlinearity parameter is of the same order as other one-step terms. We find the exchange interference further suppresses the one-step process in this parameter regime. Our findings further support the crucial assumption made in laser-plasma simulation codes that at high intensities, the trident process can be well-approximated by repeated iteration of the single-vertex subprocesses. The applicability of this assumption to higher-vertex processes has fundamental importance to the development of simulation capabilities.

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B. King, A. M. Fedotov. 2018-01-22. The effect of interference on the trident process in a constant crossed field. https://doi.org/10.1103/physrevd.98.016005

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