File:PhysRevC.100.024910.pdf
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DescriptionPhysRevC.100.024910.pdf |
English: We present a general systematic formalism for describing dynamics of fluctuations in an arbitrary relativistic hydrodynamic flow, including their feedback (known as long-time hydrodynamic tails). The fluctuations are described by two-point equal-time correlation functions. We introduce a definition of equal time in a situation where the local rest frame is determined by the local flow velocity and a method of taking derivatives and Wigner transforms of such equal-time correlation functions, which we call confluent. We find that not only do the equations for confluent Wigner functions resemble kinetic equations but also the kinetic equation for phonons propagating on an arbitrary background nontrivially matches the equations for Wigner functions, including relativistic inertial and Coriolis forces due to acceleration and vorticity of the flow. We also describe the procedure of renormalization of short-distance singularities which eliminates cutoff dependence, allowing efficient numerical implementation of these equations. |
Date | |
Source |
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.100.024910 https://doi.org/10.1103/PhysRevC.100.024910 |
Author | Xin An, Gökçe Başar, Mikhail Stephanov, and Ho-Ung Yee |
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Short title | Relativistic hydrodynamic fluctuations |
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Image title | Phys. Rev. C 100, 024910 (2019). doi:10.1103/PhysRevC.100.024910 |
Author | Xin An |
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Software used | Published by the American Physical Society |
Conversion program | Acrobat Distiller 10.1.16 (Windows) |
Encrypted | no |
Page size | 589.5 x 792 pts |
Version of PDF format | 1.3 |
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