Multiplicative noise and the diffusion of conserved densities

doi:10.1007/JHEP01(2021)071

	Multiplicative noise and the diffusion of conserved densities
	Chao, Jingyi 2; Schafer, Thomas 1
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2021
卷号	2021 期号:1 页码:17
关键词	Effective Field Theories Quark-Gluon Plasma Stochastic Processes
ISSN号	1029-8479
DOI	10.1007/JHEP01(2021)071
通讯作者	Chao, Jingyi(jychao@impcas.ac.cn)
英文摘要	Stochastic fluid dynamics governs the long time tails of hydrodynamic correlation functions, and the critical slowing down of relaxation phenomena in the vicinity of a critical point in the phase diagram. In this work we study the role of multiplicative noise in stochastic fluid dynamics. Multiplicative noise arises from the dependence of transport coefficients, such as the diffusion constants for charge and momentum, on fluctuating hydrodynamic variables. We study long time tails and relaxation in the diffusion of a conserved density (model B), and a conserved density coupled to the transverse momentum density (model H). Careful attention is paid to fluctuation-dissipation relations. We observe that multiplicative noise contributes at the same order as non-linear interactions in model B, but is a higher order correction to the relaxation of a scalar density and the tail of the stress tensor correlation function in model H.
资助项目	[US Department of Energy] ; [United States Department of Energy (DOE)] ; [BEST (Beam Energy Scan Theory) DOE Topical Collaboration] ; [Major State Basic Research Development Program in China] ; [National Basic Research Program of China]
WOS关键词	FIELD-THEORY ; EQUATIONS ; DYNAMICS ; RENORMALIZATION
WOS研究方向	Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000609437600003
资助机构	US Department of Energy ; BEST (Beam Energy Scan Theory) DOE Topical Collaboration ; Major State Basic Research Development Program in China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/136965]
专题	中国科学院近代物理研究所
作者单位	1.University of North Carolina 2.Institute of Modern Physics, Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Chao, Jingyi,Schafer, Thomas. Multiplicative noise and the diffusion of conserved densities[J]. JOURNAL OF HIGH ENERGY PHYSICS,2021,2021(1):17.
APA	Chao, Jingyi,&Schafer, Thomas.(2021).Multiplicative noise and the diffusion of conserved densities.JOURNAL OF HIGH ENERGY PHYSICS,2021(1),17.
MLA	Chao, Jingyi,et al."Multiplicative noise and the diffusion of conserved densities".JOURNAL OF HIGH ENERGY PHYSICS 2021.1(2021):17.