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arXiv 0811.2962gr-qchep-th
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虫洞形成的简单解析模型

Simple analytic model of wormhole formation

Hideki Maeda

摘要:

一个明确的和简单的解决方案表示虫洞的形成。时空是通过将闵可夫斯基和罗伯茨时空以规则的方式粘在零超曲面上而构造的。Roberts解中的参数必须给出无质量标量场的负动力学项。虽然曲率奇点出现在虫洞形成的时刻,但它瞬间消失。这种瞬时奇异性在径向因果测地线上的蒂普勒和克罗拉克意义上都是弱的。

英文摘要:

An explicit and simple solution representing the wormhole formation is presented. The spacetime is constructed by gluing the Minkowski and Roberts spacetimes at null hypersurfaces in a regular manner. The parameters in the Roberts solution are required to give the negative kinetic term for the massless scalar field. Although a curvature singularity appears at the moment of the wormhole formation, it disappears instantaneously. This instantaneous singularity is weak in the senses of both Tipler and Królak along radial causal geodesics.

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