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Alternative gauge for the description of the light-matter interaction in a relativistic framework

Selstø, Sølve; Kjellsson, Tor; Lindroth, Eva; Simonsen, Aleksander; Førre, Morten
Peer reviewed, Journal article
Published version
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Permanent lenke
https://hdl.handle.net/1956/16693
Utgivelsesdato
2017-08
Metadata
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Samlinger
  • Department of Physics and Technology [1825]
Originalversjon
https://doi.org/10.1103/physreva.96.023426
Sammendrag
We present a generalized velocity gauge form of the relativistic laser-matter interaction. In comparison with the (equivalent) regular minimal coupling description, this form of light-matter interaction results in superior convergence properties for the numerical solution of the time-dependent Dirac equation. This applies both to the numerical treatment and, more importantly, to the multipole expansion of the laser field. The advantages of the alternative gauge is demonstrated in hydrogen by studies of the dynamics following the impact of superintense laser pulses of extreme ultraviolet wavelengths and subfemtosecond duration.
Utgiver
American Physical Society
Tidsskrift
Physical Review A. Atomic, Molecular, and Optical Physics
Opphavsrett
Copyright 2017 American Physical Society

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