Sauter-Schwinger effect for colliding laser pulses
Sauter-Schwinger effect for colliding laser pulses
Kohlfürst, C.; Ahmadiniaz, N.; Oertel, J.; Schützhold, R.
We study electron-positron pair creation by the electromagnetic field of two colliding laser pulses as described by the vector potential
A(t,r) = [f(ct−x) +f(ct+x)]ey. Employing the world-line instanton technique as well as a generalized WKB approach, we find that the pair creation rate along the symmetry axisx= 0(where one would expect the maximum contribution) displays the same exponential dependence as for a purely time-dependent electric field A(t) = 2f(ct)ey. The pre-factor in front of this exponential does also contain corrections due to focusing or de-focusing effects induced by the spatially inhomogeneous magnetic field. We compare our analytical results to numerical simulations using the Dirac-Heisenberg-Wigner method and find good agreement.
Keywords: Sauter-Schwinger effect; WKB; Worldline instanton; Numerical analysis
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Contribution to WWW
arXiv:2107.08741 [hep-ph]: https://arxiv.org/abs/2107.08741 -
Physical Review Letters 129(2022)24, 241801
DOI: 10.1103/PhysRevLett.129.241801
Cited 14 times in Scopus
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Permalink: https://www.hzdr.de/publications/Publ-34066