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  • 1Max-Planck-Institut für Kernphysik, Postfach 103980, 69029 Heidelberg, Germany. dipiazza@mpi-hd.mpg.de

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Researchers explored electron-positron pair production using strong and weak laser fields colliding with a nucleus. Adjusting the weak field

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Area of Science:

  • Quantum Electrodynamics (QED)
  • High-Intensity Laser Physics

Background:

  • Electron-positron pair production is a fundamental quantum process.
  • Previous studies often focused on single laser fields or different collision geometries.
  • Tunneling pair production requires overcoming a significant energy barrier.

Purpose of the Study:

  • To investigate tunneling electron-positron pair production in a novel laser-nucleus collision setup.
  • To analytically calculate the pair-production rate under specific field conditions.
  • To assess the feasibility of observing this phenomenon with current technology.

Main Methods:

  • Utilizing a theoretical model with a strong low-frequency and a weak high-frequency laser field.
  • Analyzing the head-on collision of these fields with a relativistic nucleus.
  • Performing analytical calculations in the undercritical strong field and near-threshold weak field limit.

Main Results:

  • The pair-production rate was calculated analytically.
  • Modulating the weak field's frequency significantly reduces the tunneling barrier.
  • Tunneling pair production is demonstrated to be achievable with existing experimental technology.

Conclusions:

  • The proposed laser-nucleus interaction setup facilitates observable tunneling pair production.
  • Tunable laser parameters offer a method to control and enhance pair production.
  • This research opens avenues for experimental verification of strong-field QED phenomena.