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Experimental Evidence for Quantum Tunneling Time.

Nicolas Camus1, Enderalp Yakaboylu1, Lutz Fechner1

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Summary
This summary is machine-generated.

Investigating electron dynamics during strong field tunneling ionization reveals a nonzero tunneling time delay. Attosecond measurements confirm theoretical predictions of electron trajectories and momentum at the tunnel exit.

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Area of Science:

  • Quantum dynamics
  • Strong field physics
  • Atomic and molecular physics

Background:

  • Understanding electron behavior during ionization is crucial for attosecond science.
  • Strong field tunneling ionization is a fundamental process in quantum mechanics.

Purpose of the Study:

  • To theoretically quantify electron trajectories emerging from tunneling ionization.
  • To experimentally validate theoretical models using attoclock measurements.
  • To investigate the influence of atomic potentials on tunneling dynamics.

Main Methods:

  • Theoretical modeling of electron dynamics in strong laser fields.
  • Attoclock measurements for precise electron trajectory analysis.
  • Comparative study of argon and krypton ionization dynamics.

Main Results:

  • Electron trajectories in the continuum were successfully modeled.
  • Experimental results from attoclock measurements showed strong agreement with theory.
  • Comparison of argon and krypton revealed sensitivity to atomic potentials.

Conclusions:

  • The study provides clear evidence for a nonzero tunneling time delay.
  • A nonvanishing longitudinal momentum of the electron at the tunnel exit was confirmed.
  • The findings validate theoretical models and enhance understanding of attosecond electron dynamics.