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Updated: Jun 25, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Pair production in laser fields oscillating in space and time.

Matthias Ruf¹, Guido R Mocken, Carsten Müller

¹Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany.

Physical Review Letters

|March 5, 2009

Summary

This study calculates electron-positron pair production from vacuum using counterpropagating lasers. Accounting for spatial dependence and magnetic fields significantly alters pair creation, reducing probability and modifying kinematics.

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Area of Science:

Quantum electrodynamics
High-intensity laser physics

Background:

Electron-positron pair production from vacuum is a key prediction of quantum electrodynamics.
Previous calculations often used approximations neglecting spatial laser field dependence and magnetic components.

Purpose of the Study:

To calculate electron-positron pair production from vacuum using counterpropagating laser beams.
To investigate the effects of spatial dependence and the magnetic component of the laser field on pair production.

Main Methods:

Calculation of pair production probability.
Inclusion of spatial dependence and magnetic field effects in the laser field.

Main Results:

The magnetic component significantly affects pair creation at high laser frequencies.
Production probability is reduced.
Kinematics are fundamentally modified.
Resonant Rabi-oscillation patterns are distorted, with shifted, multiplied, and split resonance positions.

Conclusions:

Accurate calculations of laser-induced pair production require considering the full laser field, including spatial dependence and magnetic components.
These factors lead to significant deviations from approximate models, impacting observable phenomena.