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Superluminal Sound and Ferromagnetic Transition in the Zeldovich Model

Published online by Cambridge University Press:  14 August 2015

G. Kalman  and
S. T. Lai
G. Kalman
Affiliation:
Dept. of Physics, Boston College, Chestnut Hill, Mass. 02167, U.S.A.
S. T. Lai
Affiliation:
Dept. of Physics, Boston College, Chestnut Hill, Mass. 02167, U.S.A.

Abstract

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The implications of the Zeldovich model (baryons interacting through a massive vector field) for the problem of superluminal sound propagation and ferromagnetic transition are examined. In a classical baryon gas at high densities correlation effects lead to the pressure increasing faster than the energy, ultimately resulting in superluminal sound; crystallization phase transition appears however at comparable densities, thus competing with the onset of superluminal sound. For a high density fermi gas the domains of ferromagnetic transition are delineated, indicating a minimal and maximal density below and above which no ferromagnetic transition can be expected. The latter is further affected by relativistic effects requiring a different approach to the calculation of exchange energy and of the ferromagnetic phase.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 53: Physics of Dense Matter , 1974 , pp. 169 - 182
Copyright
Copyright © Reidel 1974 

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