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arXiv 0907.4002gr-qc
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再论de Sitter时空中电磁场的协变滞后格林函数

More on the covariant retarded Green's function for the electromagnetic field in de Sitter spacetime

Atsushi Higuchi, Yen Cheong Lee, Jack R. Nicholas

摘要:

在最近的一篇论文(Phys. Rev. D78,084031(2008),arXiv:0808.0642,参考文献[1])中,通过例子表明,协变延迟格林函数,特别是电磁和线性化引力的规范,可以用来正确地再现场的结构,尽管de Sitter时空中过去无穷大的类空性质。本文推广了文献[1]关于电磁场的工作,证明了具有任意规范参数值的协变滞后格林函数再现了de Sitter时空对极点上两个相反电荷的电磁场。

英文摘要:

In a recent paper (Phys. Rev. D78, 084031 (2008), arXiv:0808.0642, Ref. [1]) it was shown in examples that the covariant retarded Green's functions in particular gauges for electromagnetism and linearized gravity can be used to reproduce field configurations correctly in spite of the spacelike nature of past infinity in de Sitter spacetime. In this paper we extend the work of Ref. [1] concerning the electromagnetic field and show that the covariant retarded Green's function with an arbitrary value of the gauge parameter reproduces the electromagnetic field from two opposite charges at antipodal points of de Sitter spacetime.

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