Thermal fluctuations propagation in the relativistic Euler regime: a causal appraisal
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It is shown that thermal fluctuations present in a simple non-degenerate relativistic fluid satisfy a wave equation in the Euler regime. The characteristic propagation speeds are calculated and the classical expression for the speed of sound is recovered at the non relativistic limit. Implications and generalizations of this work are analyzed.
Six pages and one figure
Six pages and one figure