Zipping and unzipping in string networks: Dynamics of Y-junctions
Zipping and unzipping in string networks: Dynamics of Y-junctions
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弦网络中的压缩和解压缩：Y 形结点的动力学
DOI：
10.1103/physrevd.91.025022
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发表时间：
2015
影响因子：
5
通讯作者：
Avgoustidis A
中科院分区：
文献类型：
--
作者：
Avgoustidis A
我们研究，在南武-后藤近似下，在一个Y型配置的三个字符串连接在一起的张力的影响下，大量的字符串结的稳定性。在连接处的弦之间的相对角度一般是随时间变化的，它的演变可以导致三弦结构的压缩或解压缩。我们发现，这些配置是稳定的变形下的张力平衡条件的交界处。角度在其平衡值处松弛，并且结相对论性地增长。然后，我们讨论其他潜在的“解压缩剂”，包括长字符串和曲率的循环，我们调查的具体解决方案表现出减速拉链和解压缩的Y结。这些结果提供了动力，将现实的字符串相互作用的影响，在网络演化模型与字符串连接。
We study, within the Nambu-Goto approximation, the stability of massive string junctions under the influence of the tensions of three strings joining together in a Y-type configuration. The relative anglebetween the strings at the junction is in general time dependent and its evolution can lead to zipping or unzipping of the three-string configuration. We find that these configurations are stable under deformations of the tension balance condition at the junction. The anglerelaxes at its equilibrium value and the junction grows relativistically. We then discuss other potential “unzipping agents” including monopole/string forces for long strings and curvature for loops, and we investigate specific solutions exhibiting decelerated zipping and unzipping of the Y junction. These results provide motivation for incorporating the effects of realistic string interactions in network evolution models with string junctions.