Scale-invariant string evolution with friction.

Scale-invariant string evolution with friction.
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具有摩擦的尺度不变弦演化。

DOI:
10.1103/physrevd.53.r575
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发表时间:
1996
期刊:
Physical review. D, Particles and fields
影响因子:
--
通讯作者:
Shellard
Shellard
中科院分区:
--
文献类型:
--
作者:
Martins;Shellard

文献摘要

被引文献

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我们研究了凝聚态和宇宙学背景下摩擦对弦网络标度演化的影响。我们导出了一个广义的“单尺度”模型,其中弦相关长度L和速度v为动力学变量。在非相对论系统中,我们得到了一个著名的L t 1/2定律,表明回路产生是重要的。对于电弱宇宙弦,我们给出了瞬态阻尼历元标度,标度为L t 5/4(或者,在物质时代,标度为L t 3/2)。低初始密度意味着早期的L t 1/2。对于GUT弦,线性标度L t的方法比以前估计的要快。
We study the effects of friction on the scaling evolution of string networks in condensed matter and cosmological contexts. We derive a generalized ‘‘one-scale’’model with the string correlation length L and velocity v as dynamical variables. In nonrelativistic systems, we obtain a well-known L∝ t 1/2 law, showing that loop production is important. For electroweak cosmic strings, we show transient damped epoch scaling with L∝ t 5/4 (or, in the matter era, L∝ t 3/2). A low initial density implies an earlier period with L∝ t 1/2. For GUT strings, the approach to linear scaling L∝ t is faster than previously estimated.© 1996 The American Physical Society.