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Stimulated scattering of electromagnetic waves carrying orbital angular momentum in quantum plasmas
Ruhr University of Bochum, Germany.
Ruhr University of Bochum, Germany.
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, The Institute of Technology.
2012 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, Vol. 86, no 1, 016403- p.Article in journal (Refereed) Published
Abstract [en]

We investigate stimulated scattering instabilities of coherent circularly polarized electromagnetic (CPEM) waves carrying orbital angular momentum (OAM) in dense quantum plasmas with degenerate electrons and nondegenerate ions. For this purpose, we employ the coupled equations for the CPEM wave vector potential and the driven (by the ponderomotive force of the CPEM waves) equations for the electron and ion plasma oscillations. The electrons are significantly affected by the quantum forces (viz., the quantum statistical pressure, the quantum Bohm potential, as well as the electron exchange and electron correlations due to electron spin), which are included in the framework of the quantum hydrodynamical description of the electrons. Furthermore, our investigation of the stimulated Brillouin instability of coherent CPEM waves uses the generalized ion momentum equation that includes strong ion coupling effects. The nonlinear equations for the coupled CPEM and quantum plasma waves are then analyzed to obtain nonlinear dispersion relations which exhibit stimulated Raman, stimulated Brillouin, and modulational instabilities of CPEM waves carrying OAM. The present results are useful for understanding the origin of scattered light off low-frequency density fluctuations in high-energy density plasmas where quantum effects are eminent.

Place, publisher, year, edition, pages
American Physical Society , 2012. Vol. 86, no 1, 016403- p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-79638DOI: 10.1103/PhysRevE.86.016403ISI: 000306415400002OAI: diva2:543972

Funding Agencies|Deutsche Forschungsgemeinschaft of Research Unit|SH21/3-21048|

Available from: 2012-08-13 Created: 2012-08-13 Last updated: 2012-10-31

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Stenflo, Lennart
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