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Amplification of magnetic fields by polaritonic flows in quantum pair plasmas

Published online by Cambridge University Press:  01 June 2007

N. SHUKLA ,
P. K. SHUKLA  and
G. E. MORFILL
N. SHUKLA
Affiliation:
Institut für Theoretische Physik IV and Centre for Plasma Science and Astrophysics, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany ([email protected]) Department of Physics, K. N. Government Postgraduate College, Gyanpur, Bhadohi 221304, U. P., India Department of Physics, Umeå University, SE-90187 Umeå, Sweden GoLP/Centro de Física de Plasmas, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal
P. K. SHUKLA
Affiliation:
Institut für Theoretische Physik IV and Centre for Plasma Science and Astrophysics, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany ([email protected]) Department of Physics, Umeå University, SE-90187 Umeå, Sweden GoLP/Centro de Física de Plasmas, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001 Lisboa, Portugal Max-Planck Institut für extraterrestrische Physik, D-45741 Garching, Germany CCLRC Centre for Fundamental Physics, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 OQX, UK SUPA Department of Physics, University of Strathclyde, Glasgow G4 ONG, UK School of Physics, University of KwaZulu-Durban, 4000 Durban, South Africa ([email protected])
G. E. MORFILL
Affiliation:
Max-Planck Institut für extraterrestrische Physik, D-45741 Garching, Germany
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Abstract

It is shown that equilibrium polaritonic flows can amplify magnetic fields in an ultra-cold quantum electron–positron/hole (polaritons) plasma. For this purpose, a linear dispersion relation has been derived by using the quantum generalized hydrodynamic equations for the polaritons, the Maxwell equation, and Faraday's law. The dispersion relation admits purely growing instabilities, the growth rates of which are proportional to the equilibrium streaming speeds of the polaritons. Possible applications of our work to the spontaneous excitation of magnetic fields and the associated cross-field transport of the polaritons in micromechanical systems, compact dense astrophysical objects (e.g. neutron stars), and intense laser–plasma interaction experiments are mentioned.

Type
Letter to the Editor
Information
Journal of Plasma Physics , Volume 73 , Issue 3 , June 2007 , pp. 289 - 293
Copyright
Copyright © Cambridge University Press 2007

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