Twisting space-time: Relativistic origin of seed magnetic field/ vorticity

Details Twisting space-time: Relativistic origin of seed magnetic field/ vorticity Twisting space-time: Relativistic origin of seed magnetic field/ vorticity

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aps..dppxi3005m&link_type=abstract

American Physical Society, 52nd Annual Meeting of the APS Division of Plasma Physics, November 8-12, 2010, abstract #XI3.005

Physics

Plasma Physics

Scientific paper

It is shown that a purely ideal mechanism, originating in the space-time distortion caused by the demands of special relativity, can break the topological constraint (leading to generalized helicity conservation) that would, otherwise, forbid the emergence of magnetic field (a generalized vorticity) in an ideal non relativistic dynamics. The new mechanism, arising form the interaction between the inhomogeneous flow fields and inhomogeneous entropy, is universal, and can provide a finite seed even for mildly relativistic flows. Simple estimates of the seed fields in cosmic settings, in particular the early hot universe filled with relativistic particle antiparticle pairs (upto the end of the electron-positron era), are provided. Possible applications of the mechanism in (intense) laser produced plasmas is also explored.

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