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arXiv 0901.4125gr-qc
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轴对称静止黑洞背景下的波动方程

The wave equation on axisymmetric stationary black hole backgrounds

Mihalis Dafermos

摘要:

理解线性波在黑洞背景上的行为是广义相对论的一个中心问题,它与作为爱因斯坦方程解的黑洞时空本身的非线性稳定性密切相关,而爱因斯坦方程是该学科的一个主要未决问题。尽管如此,直到最近,甚至最基本的有界性和线性波的定量衰减性质才在一个适当的一般类的黑洞外部时空中得到证明。这次演讲将回顾我们目前对黑洞背景上的波的数学理解,从Kay和Wald关于Schwarzschild外部的经典有界性定理开始,并以最近的有界性和衰变定理(与Igor Rodnianski合作证明)结束。这类时空特别包括缓慢旋转的克尔时空,但在有界性定理的情况下,实际上要大得多,包括一般的轴对称静止时空,其几何足够接近史瓦西,其Killing场跨越视界的零生成元。

英文摘要:

Understanding the behaviour of linear waves on black hole backgrounds is a central problem in general relativity, intimately connected with the nonlinear stability of the black hole spacetimes themselves as solutions to the Einstein equations--a major open question in the subject. Nonetheless, it is only very recently that even the most basic boundedness and quantitative decay properties of linear waves have been proven in a suitably general class of black hole exterior spacetimes. This talk will review our current mathematical understanding of waves on black hole backgrounds, beginning with the classical boundedness theorem of Kay and Wald on exactly Schwarzschild exteriors and ending with very recent boundedness and decay theorems (proven in collaboration with Igor Rodnianski) on a wider class of spacetimes. This class of spacetimes includes in particular slowly rotating Kerr spacetimes, but in the case of the boundedness theorem is in fact much larger, encompassing general axisymmetric stationary spacetimes whose geometry is sufficiently close to Schwarzschild and whose Killing fields span the null generator of the horizon.

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