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arXiv 1106.4339math.DGgr-qc
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非负数量曲率、静态度量和准局部质量的填充

Fill-ins of nonnegative scalar curvature, static metrics, and quasi-local mass

Jeffrey L. Jauregui

摘要:

考虑一个“Bartnik数据”三元组$(Σ, γ,H)$,其中$Σ$是一个具有黎曼度量$γ$和正函数$H$的拓扑2-球面。我们认为Bartnik数据作为一个边界条件的问题,找到一个紧凑的黎曼3-流形$(Ω,g)$的非负数量曲率,其边界是等距的平均曲率$H$的$(Σ,γ)$。考虑扰动数据$(Σ, γ, λH)$的正实参数$λ$,我们发现,这样的“填充”$(Ω,g)$必须存在的$λ$小,不能存在的$λ$大,此外,我们证明存在一个中间门限值。主要的应用是构造一个新的准局部质量,这是广义相对论中的一个有趣的概念。这个质量具有非负性质,但与许多其他定义不同的是,它在静态真空(而不是平坦)区域趋于消失。我们也认识到这种质量作为一种特殊情况下的扭曲产品的准本地质量泛函。本文中的几个想法借鉴了布雷,布伦德尔-马克斯-内维斯,科尔维诺,苗和施-谭的工作。

英文摘要:

Consider a triple of "Bartnik data" $(Σ, γ,H)$, where $Σ$ is a topological 2-sphere with Riemannian metric $γ$ and positive function $H$. We view Bartnik data as a boundary condition for the problem of finding a compact Riemannian 3-manifold $(Ω,g)$ of nonnegative scalar curvature whose boundary is isometric to $(Σ,γ)$ with mean curvature $H$. Considering the perturbed data $(Σ, γ, λH)$ for a positive real parameter $λ$, we find that such a "fill-in" $(Ω,g)$ must exist for $λ$ small and cannot exist for $λ$ large; moreover, we prove there exists an intermediate threshold value. The main application is the construction of a new quasi-local mass, a concept of interest in general relativity. This mass has the nonnegativity property, but differs from many other definitions in that it tends to vanish on static vacuum (as opposed to flat) regions. We also recognize this mass as a special case of a type of twisted product of quasi-local mass functionals. Several ideas in this paper draw on work of Bray, Brendle--Marques--Neves, Corvino, Miao, and Shi--Tam.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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