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Strong field tunnel ionization by real-valued classical trajectories
1Department of Physics, University of Waterloo, Ontario, N2L 3G1 Canada.
Physical Review Letters
|July 15, 2003
Summary
This study enhances semiclassical methods for atomic tunnel ionization. New techniques improve accuracy and computational scaling, especially in higher dimensions.
Area of Science:
- Atomic physics
- Quantum mechanics
- Computational physics
Background:
- Strong field tunnel ionization is crucial in atomic physics.
- Semiclassical initial value representation methods offer insights but face limitations.
Purpose of the Study:
- To develop accurate semiclassical methods for atomic tunnel ionization.
- To improve the description of tunneling dynamics in strong fields.
Main Methods:
- Utilizing real-valued classical trajectories in semiclassical propagators.
- Integrating semiclassical propagators with S-matrix techniques.
- Comparing methods in one and two dimensions.
Main Results:
- Standard semiclassical propagators inaccurately describe one-dimensional tunnel ionization.
- Incorporating S-matrix techniques recovers tunneling dynamics.
- New methods show improved convergence scaling with dimensionality.
Conclusions:
- Semiclassical methods, when combined with S-matrix techniques, accurately model atomic tunnel ionization.
- This approach incorporates core effects into strong field approximations.
- The enhanced method demonstrates superior performance in higher dimensions.
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