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Routes to nonsequential double ionization

Kopold1, Becker, Rottke

  • 1Max-Born-Institut, Max-Born-Strasse 2a, 12489 Berlin, Germany.

Physical Review Letters
|October 21, 2000
PubMed
Summary
This summary is machine-generated.

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A new method calculates the S matrix for intense-laser atom physics, aiding the study of electron momentum in double ionization. Results match neon experiments but differ for helium and argon.

Area of Science:

  • Atomic and Laser Physics
  • Quantum Mechanics
  • Computational Physics

Background:

  • Accurate calculation of the S matrix is crucial for understanding complex atomic processes in intense laser fields.
  • Existing methods often struggle with many-electron systems, limiting detailed analysis of phenomena like nonsequential double ionization.

Purpose of the Study:

  • To develop a novel method for calculating the S matrix in many-electron processes within intense-laser atom physics.
  • To apply this method to analyze the total electronic momentum distribution in nonsequential double ionization.
  • To compare the method's predictions with experimental data for different atomic species.

Main Methods:

  • The proposed method draws an analogy to the strong-field approximation used for one-electron processes.

Related Experiment Videos

  • Approximations to the classical action are made based on the evolving process scenario.
  • These approximations enable the evaluation of the quantum-mechanical S matrix.

    • Main Results:

    • The method was applied to study the total electronic momentum distribution in nonsequential double ionization.
    • A rescattering scenario showed good agreement with experimental measurements for neon.
    • Comparable agreement was not achieved for helium and argon, suggesting the need for alternative scenarios.

    Conclusions:

    • The developed S matrix calculation method shows promise for analyzing many-electron dynamics in intense laser fields.
    • The rescattering scenario is validated for neon but requires further investigation for helium and argon.
    • This work opens avenues for exploring alternative physical scenarios in atomic ionization processes.