Dynamics and properties of chiral cosmic strings in Minkowski space
Dynamics and properties of chiral cosmic strings in Minkowski space
复制标题
闵可夫斯基空间中手性宇宙弦的动力学和性质
DOI：
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发表时间：
2000
期刊：
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通讯作者：
D. Steer
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文献类型：
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作者：
A. Davis;T. Kibble;M. Pickles;D. Steer
在超对称模型中，手性宇宙弦是在Infl运算结束时自然产生的，其中对称性通过D项被打破。因此，在这样的理论中，在fl变换和宇宙弦都对密度和微波背景(CMBR)扰动有贡献的情况下，有必要了解手性宇宙弦网络的演化。我们研究了Minkowski空间中手征宇宙弦的动力学，并评论了一些与Nambu-Goto弦的不同之处。为了做到这一点，我们遵循了卡特和Pe-ter的工作，他们证明了手征宇宙弦的运动方程归结为一个波动方程和两个约束，其中只有一个不同于熟悉的Nambu-ff约束。我们研究了由许多次谐波组成的手性弦环解，确定了它们的自交概率，并对这些结果可能的宇宙学意义进行了评论。fi。1导言在过去的几年里，已经对Nambu-Goto(NG)宇宙弦的宇宙学结果进行了许多高精度的计算[1，2，3，4]。事实上，这样的预测最近被与回旋镖数据[5，6，7]进行了比较。大多数对拓扑缺陷的宇宙学性质的研究(见[8，9]的摘要)都集中在NG弦上，这是有充分理由的：NG弦是最简单的宇宙弦类型，它们的运动方程(至少在Minkowski空间中)可以精确地求解。在格子上，可以使用高度ffi的Smith-Vilenkin算法[10]；事实上，最近的一些预测是基于NG网络演化的Minkowski空间码[3，7]。
AbstractChiral cosmic strings are produced naturally at the end of inflation in super-symmetric models where the symmetry is broken via a D-term. Consequently insuch theories, where both inflation and cosmic strings contribute to the densityand CMBR (microwave background) perturbations, it is necessary to understandthe evolution of chiral cosmic string networks. We study the dynamics of chiralcosmic strings in Minkowski space and comment on a number of differences withthose of Nambu-Goto strings. To do this we follow the work of Carter and Pe-ter who showed that the equations of motion for chiral cosmic strings reduce to awave equation and two constraints, only one of which is different from the familiarNambu-Goto constraints. We study chiral string loop solutions consisting of manyharmonics and determine their self-intersection probabilities, and comment on thepossible cosmological significance of these results. 1 Introduction In the last few years many high accuracy calculations have been made of cosmologicalconsequences of Nambu-Goto (NG) cosmic strings [1, 2, 3, 4]. Indeed, such predictionswere recently compared to the Boomerang data [5, 6, 7]. There are good reasons whymost studies of the cosmological effects of topological defects (see [8, 9] for a summary)have concentrated on NG strings: these are the simplest type of cosmic string, and theirequations of motion (at least in Minkowski space) can be solved exactly. On a lattice onecan use the highly efficient Smith-Vilenkin algorithm [10]; and in fact some of the recentpredictions are based on Minkowski space codes of NG network evolution [3, 7].