Nonlinear Constraints on Relativistic Fluids Far from Equilibrium

被引：66

作者：

Bemfica, Fabio S. ^{[1
]}

Disconzi, Marcelo M. ^{[2
]}

Hoang, Vu ^{[3
]}

Noronha, Jorge ^{[4
]}

Radosz, Maria ^{[3
]}

机构：

[1] Univ Fed Rio Grande do Norte, Escola Ciencias & Tecnol, BR-59072970 Natal, RN, Brazil

[2] Vanderbilt Univ, Dept Math, Nashville, TN 37211 USA

[3] Univ Texas San Antonio, Dept Math, One UTSA Circle, San Antonio, TX 78249 USA

[4] Univ Illinois, Illinois Ctr Adv Studies Universe, Dept Phys, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 126卷 / 22期

关键词：

THERMODYNAMICS; NONSTATIONARY; CAUSALITY; EQUATIONS; STABILITY;

D O I：

10.1103/PhysRevLett.126.222301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

New constraints are found that must necessarily hold for Israel-Stewart-like theories of fluid dynamics to be causal far away from equilibrium. Conditions that are sufficient to ensure causality, local existence, and uniqueness of solutions in these theories are also presented. Our results hold in the full nonlinear regime, taking into account bulk and shear viscosities (at zero chemical potential), without any simplifying symmetry or near-equilibrium assumptions. Our findings provide fundamental constraints on the magnitude of viscous corrections in fluid dynamics far from equilibrium.

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