The "ripples" on relativistically expanding fluid

Abstract

Recent studies have shown that fluctuations of various types play important roles in the evolution of the fireball created in relativistic heavy ion collisions and bear many phenomenological consequences for experimental observables. The bulk dynamics of the fireball is well described by relativistic hydrodynamic expansion and the fluctuations on top of such expanding background can be studied within the linearized hydrodynamic framework. In this work we present complete and analytic sound wave solutions on top of both Bjorken flow and Hubble flow backgrounds. We also briefly discuss the applications of these solutions in heavy ion collisions.

arXiv comment27 pages, 10 figures

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• Thermal noise in a boost-invariant matter expansion in relativistic heavy-ion collisions
• Higher order anisotropies in the Buda-Lund model: Disentangling flow and density field anisotropies
• Waves in magnetized quark matter
• Kinetic evolution and correlation of fluctuations in an expanding quark gluon plasma
• Thermal noise in non-boost-invariant dissipative hydrodynamics
• Perturbative accelerating solutions of relativistic hydrodynamics
• Calculation of Power Spectrum in the Little Bangs