Nonequilibrium evolution of strong-field anisotropic ionized electrons towards a delayed plasma-state

Rigorous quantum calculations of the femtosecond ionization of hydrogen atoms in air lead to highly anisotropic electron and ion angular (momentum) distributions. A quantum Monte-Carlo analysis of the subsequent many-body dynamics reveals two distinct relaxation steps, first to a nearly isotropic ho...

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Bibliographic Details
Published in:Optics express 2012-01, Vol.20 (3), p.2310-2318
Main Authors: Pasenow, B, Moloney, J V, Koch, S W, Chen, S H, Becker, A, Jaroń-Becker, A
Format: Article
Language:English
Subjects:
Anisotropy
Computer Simulation
Electromagnetic Fields
Electrons
Ions
Models, Theoretical
Monte Carlo Method
Phase Transition
Plasma Gases - chemistry
Scattering, Radiation
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Summary:Rigorous quantum calculations of the femtosecond ionization of hydrogen atoms in air lead to highly anisotropic electron and ion angular (momentum) distributions. A quantum Monte-Carlo analysis of the subsequent many-body dynamics reveals two distinct relaxation steps, first to a nearly isotropic hot nonequilibrium and then to a quasi-equilibrium configuration. The collective isotropic plasma state is reached on a picosecond timescale well after the ultrashort ionizing pulse has passed.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.20.002310