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arXiv 0904.4873gr-qc
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一种改进的广义谐振Einstein系统规范驱动器

An Improved Gauge Driver for the Generalized Harmonic Einstein System

Lee Lindblom, Bela Szilagyi

摘要:

介绍了一种新的规范驱动器,用于爱因斯坦方程的广义调和表示。这个新的驱动程序允许一个相当一般的类的规范条件,以保持双曲线的组合进化系统的方式来实现。该驱动程序更稳定和有效,与以前的驱动程序不同,它允许使用双帧进化技术进行稳定的进化。适当的边界条件,这个新的规范驱动程序的构造,并引入了一个新的边界条件的GH爱因斯坦系统中的时空度规的“规范”组件。通过数值试验证明了这种新规范驱动器的稳定性和有效性,它对单黑洞时空演化施加了一个新的阻尼波规范条件。

英文摘要:

A new gauge driver is introduced for the generalized harmonic (GH) representation of Einstein's equation. This new driver allows a rather general class of gauge conditions to be implemented in a way that maintains the hyperbolicity of the combined evolution system. This driver is more stable and effective, and unlike previous drivers, allows stable evolutions using the dual-frame evolution technique. Appropriate boundary conditions for this new gauge driver are constructed, and a new boundary condition for the ``gauge'' components of the spacetime metric in the GH Einstein system is introduced. The stability and effectiveness of this new gauge driver are demonstrated through numerical tests, which impose a new damped-wave gauge condition on the evolutions of single black-hole spacetimes.

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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