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arXiv 1609.01153gr-qcastro-ph.CO
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宇宙弦环上扭结的引力光滑化

Gravitational smoothing of kinks on cosmic string loops

Jeremy M. Wachter, Ken D. Olum

摘要:

我们分析了引力反作用对宇宙弦环扭结的影响,这是一个重要的决定因素的形状,从而潜在的可观测性,弦环可能存在于今天的宇宙中。扭结未修圆,但可拉直。这意味着反反应只会导致扭结的环路在其寿命的某个潜在的大部分之后形成尖点。在某些环中,对称性甚至阻止了这一过程,因此环以自相似的方式蒸发,而扭结不变。作为一个例子,我们讨论了矩形Garfinkle-Vachaspati回路上的反作用。

英文摘要:

We analyze the effect of gravitational back reaction on cosmic string loops with kinks, which is an important determinant of the shape, and thus the potential observability, of string loops which may exist in the universe today. Kinks are not rounded off, but may be straightened out. This means that back reaction will only cause loops with kinks to develop cusps after some potentially large fraction of their lifetimes. In some loops, symmetries prevent even this process, so that the loop evaporates in a self-similar fashion and the kinks are unchanged. As an example, we discuss back-reaction on the rectangular Garfinkle-Vachaspati loop.

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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