Prolongation of friction dominated evolution for superconducting cosmic strings
Prolongation of friction dominated evolution for superconducting cosmic strings
复制标题
超导宇宙弦的摩擦主导演化的延长
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
G. Sigl
中科院分区：
文献类型：
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作者：
B. Carter;R. Brandenberger;A. Davis;G. Sigl
这项研究关注的是基于粒子物理理论的宇宙学场景，这些场景会产生超导宇宙弦(超导宇宙弦随后的演化可能会产生被称为涡旋的稳定环路配置)。在以前的工作中，已经处理了弦电流的电磁耦合不存在或不重要的情况。本工作的目的是为与周围等离子体的电磁相互作用显著影响弦动力学的情况提供定量估计。特别是，它将表明，电流可以变得足够强，使得摩擦主导的弦运动的初始时间显著延长，这将需要加强弦分布频谱的短长度标度端，如果摩擦主导的情况持续到等离子体复合时，则具有潜在的可观察到的宇宙学意义。
This investigation is concerned with cosmological scenarios based on particle physics theories that give rise to superconducting cosmic strings (whose subsequent evolution may produce stable loop configurations known as vortons). Cases in which electromagnetic coupling of the string current is absent or unimportant have been dealt with in previous work. The purpose of the present work is to provide quantitative estimates for cases in which electromagnetic interaction with the surrounding plasma significantly affects the string dynamics. In particular it will be shown that the current can become sufficiently strong for the initial period of friction dominated string motion to be substantially prolonged, which would entail a reinforcement of the short length scale end of the spectrum of the string distribution, with potentially observable cosmological implications if the friction dominated scenario lasts until the time of plasma recombination.