Relativistic noise

Joseph Kapusta, Berndt Müller, Misha Stephanov

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The relativistic theory of hydrodynamic fluctuations, or noise, is derived and applied to high energy heavy ion collisions. These fluctuations are inherent in any space-time varying system and are present in addition to initial state fluctuations. We illustrate the effects with the boost-invariant Bjorken solution to the hydrodynamic equations. Long range correlations in rapidity are induced by propagation of sound modes. The magnitude of these correlations is directly proportional to the viscosities. These fluctuations should be enhanced near a phase transition or rapid crossover.

Original languageEnglish (US)
Pages (from-to)781-790
Number of pages10
JournalActa Physica Polonica B
Issue number4
StatePublished - Apr 2012


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