Nambu-Goto dynamics of field theory cosmic string loops

Nambu-Goto dynamics of field theory cosmic string loops
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场论宇宙弦环的南部-后岛动力学

DOI:
10.1088/1475-7516/2023/05/035
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发表时间:
2023
影响因子:
6.4
通讯作者:
Urrestilla, Jon
Urrestilla, Jon
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Blanco-Pillado, Jose J.;Jiménez-Aguilar, Daniel;Lizarraga, Joanes;Lopez-Eiguren, Asier;Olum, Ken D.;Urio, Ander;Urrestilla, Jon

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我们对宇宙场理论模拟中得到的宇宙弦环的动力学与根据Nambu-Goto作用的预期运动进行了详细的比较。我们证明这些环路遵循NG有效理论中预测的轨迹,除了在高曲率区域,能量以大质量辐射的形式从环路发射。在模拟中所研究的所有回路中,这种能量损失都会持续下去,直到它们自相交或变得足够小,以至于在完成单个振荡之前就湮灭和消失。我们评论了这项研究对宇宙场理论模拟结果的解释的相关性,以及它们对宇宙背景的外推。
We perform a detailed comparison of the dynamics of cosmic string loops obtained in cosmological field theory simulations with their expected motion according to the Nambu-Goto action. We demonstrate that these loops follow the trajectories predicted within the NG effective theory except in regions of high curvature where energy is emitted from the loop in the form of massive radiation. This energy loss continues for all the loops studied in this simulation until they self-intersect or become small enough that they annihilate and disappear well before they complete a single oscillation. We comment on the relevance of this investigation to the interpretation of the results from cosmological field theory simulations as well as their extrapolation to a cosmological context.
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