Shear Flows in Far-from-Equilibrium Strongly Coupled Fluids

doi:10.1103/PhysRevLett.129.011602

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	Shear Flows in Far-from-Equilibrium Strongly Coupled Fluids
	Baggioli, Matteo 2; Li, Li 5; Sun, Hao-Tian
刊名	PHYSICAL REVIEW LETTERS
	2022
卷号	129 期号:1 页码:11602
关键词	VISCOSITY
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.129.011602
英文摘要	Although the viscosity of a fluid ranges over several orders of magnitude and is extremely sensitive to microscopic structure and molecular interactions, it has been conjectured that its (opportunely normalized) minimum displays a universal value which is experimentally approached in strongly coupled fluids such as the quark-gluon plasma. At the same time, recent findings suggest that hydrodynamics could serve as a universal attractor even when the deformation gradients are large and that dissipative transport coefficients, such as viscosity, could still display a universal behavior far from equilibrium. Motivated by these observations, we consider the real-time dissipative dynamics of several holographic models under large shear deformations. In all the cases considered, we observe that at late time both the viscosity-entropy density ratio and the dimensionless ratio between energy density and entropy density approach a constant value. Whenever the shear rate in units of the energy density is small at late time, these values coincide with the expectations from near equilibrium hydrodynamics. Surprisingly, even when this is not the case, and the system at late time is far from equilibrium, the viscosity-to-entropy ratio approaches a constant which decreases monotonically with the dimensionless shear rate and can be parametrically smaller than the hydrodynamic result.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27855]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Univ Chinese Acad Sci, Sch Fundamental Phys & Math Sci, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples R China 2.Shanghai Jiao Tong Univ, Wilczek Quantum Ctr, Sch Phys & Astron, Shanghai 200240, Peoples R China 3.Shanghai Res Ctr Quantum Sci, Shanghai 201315, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 5.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Baggioli, Matteo,Li, Li,Sun, Hao-Tian. Shear Flows in Far-from-Equilibrium Strongly Coupled Fluids[J]. PHYSICAL REVIEW LETTERS,2022,129(1):11602.
APA	Baggioli, Matteo,Li, Li,&Sun, Hao-Tian.(2022).Shear Flows in Far-from-Equilibrium Strongly Coupled Fluids.PHYSICAL REVIEW LETTERS,129(1),11602.
MLA	Baggioli, Matteo,et al."Shear Flows in Far-from-Equilibrium Strongly Coupled Fluids".PHYSICAL REVIEW LETTERS 129.1(2022):11602.