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Phys. Rev. Lett. 93, 013601 (2004) [4 pages]

Positronium in Intense Laser Fields

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Björn Henrich1, Karen Z. Hatsagortsyan1,2,*, and Christoph H. Keitel1,3,†
1Physikalisches Institut der Universität, Hermann-Herder Strasse 3, 79104 Freiburg, Germany
2Department of Quantum Electronics, Yerevan State University, 375025 Yerevan, Armenia
3Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany

Received 18 February 2003; published 2 July 2004

The dynamics and radiation of positronium are investigated in intense laser fields. Our two-body quantum mechanical treatment displays the tunneling, free-evolution, and recollision dynamics of electron and positron in both the oscillating laser electric and laser magnetic field components. In spite of significant momentum transfer of the numerous incoming laser photons, recollisions of both particles are shown to occur automatically after tunneling ionization, along with substantial x-ray and gamma-ray emission during recombination and annihilation processes.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.013601
DOI:
10.1103/PhysRevLett.93.013601
PACS:
36.10.Dr, 42.50.Hz, 42.65.Ky

*Electronic address: khats@ysu.am

†Electronic address: keitel@mpi-hd.mpg.de

 
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