Mass shift effects in nonperturbative multiphoton pair production for arbitrary polarized electric fields

Understand

The mass shift effects in multiphoton pair production of a nonperturbative nature for arbitrary polarized electric fields are investigated numerically by employing the real-time Dirac-Heisenberg-Wigner formalism, and theoretically by proposing an effective energy concept.

• It is found that the theoretical results are agreement with the numerical ones very well.
• It is the first time to consider the roles of the momenta of created particles and the polarizations of external fields played in the mass shift effects.
• These results can deepen the understanding of pair production in the nonperturbative threshold regime.