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Electric field controlled, pulsed autoionization in two electron wave packets.

J G Story1, H N Ereifej

  • 1Department of Physics, University of Missouri-Rolla, Rolla, Missouri 65409-0640, USA.

Physical Review Letters
|February 15, 2001
PubMed
Summary

Researchers demonstrate precise control over electron wave packet evolution using static electric fields. This method enables picosecond-scale timing of pulsed autoionization events in calcium atoms.

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Area of Science:

  • Atomic Physics
  • Quantum Mechanics
  • Laser Spectroscopy

Background:

  • Controlling quantum systems is crucial for developing new technologies.
  • Wave packet dynamics in multi-electron atoms are complex and challenging to manipulate.
  • Autoionization is a key process in atomic decay pathways.

Purpose of the Study:

  • To demonstrate control over the temporal evolution of a two-electron wave packet.
  • To utilize static electric fields for precise timing of autoionization events.
  • To investigate Stark-tuned doubly excited states in calcium atoms.

Main Methods:

  • Excitation of calcium atoms to a doubly excited state using a short-pulsed laser.
  • Application of a static electric field to induce and control autoionization.

Related Experiment Videos

  • Monitoring wave packet evolution via subsequent laser excitation and field ionization detection of Rydberg states.

    • Main Results:

    • Successful demonstration of controlling wave packet evolution on a picosecond timescale.
    • Pulsed autoionization events were generated and their timing precisely managed.
    • Energy degeneracy between specific doubly excited states and Stark-tuned Rydberg states was exploited.

    Conclusions:

    • Static electric fields offer a viable method for controlling quantum wave packet dynamics.
    • This technique allows for precise temporal manipulation of autoionization processes.
    • The findings have implications for quantum control and advanced atomic state manipulation.