Acoustics of tachyon Fermi gas

Details Acoustics of tachyon Fermi gas Acoustics of tachyon Fermi gas

2011-03-11

arxiv.org/abs/1103.2276v4

Phys.Rev.D83:124013,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 2 figures (color)

Scientific paper

10.1103/PhysRevD.83.124013

We consider a Fermi gas of free tachyons as a continuous medium and find whether it satisfies the causality condition. There is no stable tachyon matter with the particle density below critical value $n_T$ and the Fermi momentum $k_F<\sqrt{\frac 32}m$ that depends on the tachyon mass $m$. The pressure $P$ and energy density $E$ cannot be arbitrary small, but the situation $P>E$ is not forbidden. Existence of shock waves in tachyon gas is also discussed. At low density $n_T

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