arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1010.2328hep-thastro-ph.CO
收藏

电荷、结与畴壁网络的标度动力学

Charge, junctions and the scaling dynamics of domain wall networks

Richard A. Battye, Jonathan A. Pearson

摘要:

研究表明,在U(1)× Z2对称性模型中,超导畴壁可以在(2+1)维的均匀带电背景和破缺磁场中的随机初始条件下形成长寿命的环,称为扭结涡旋。在本文中,我们研究了一个类似的模型与超立方对称耦合到一个完整的U(1),其中的畴壁可以形成结,从而形成一个晶格。我们称之为电荷耦合各向异性(CCCA)模型。首先,我们提出了一个详细的参数研究的U(1)x Z 2模型,我们改变的功能包括初始条件的性质和耦合常数。这使我们能够确定有趣的参数,在更复杂的,因此更计算密集型,CCCA模型。特别是我们发现,相互作用项的系数可以用来工程师三个独立的制度:相混合,冷凝和相分离与冷凝制度对应的耦合常数的一个单一的值,由四次相互作用项的行列式为零定义。然后,我们确定的CCCA模型中的冷凝制度,并表明,在这个制度中,畴壁的数量不按标准的方式缩放,如果初始条件有足够高的背景电荷。我们发现,在动态范围的限制下,网络似乎正在向玻璃状配置移动,而不是形成畴壁的环。我们发现这些结果与超立方体的维数无关。

英文摘要:

It has been shown that superconducting domain walls in a model with U(1) x Z2 symmetry can form long-lived loops called kinky vortons from random initial conditions in the broken field and a uniform charged background in (2+1) dimensions. In this paper we investigate a similar model with a hyper-cubic symmetry coupled to an unbroken U(1) in which the domain walls can form junctions and hence a lattice. We call this model the charge-coupled cubic-anisotropy (CCCA) model. First, we present a detailed parametric study of the U(1) x Z2 model; features which we vary include the nature of the initial conditions and the coupling constants. This allows us to identify interesting parameters to vary in the more complicated, and hence more computationally intensive, CCCA models. In particular we find that the coefficient of the interaction term can be used to engineer three separate regimes: phase mixing, condensation and phase separation with the condensation regime corresponding to a single value of the coupling constant defined by the determinant of the quartic interaction terms being zero. We then identify the condensation regime in the CCCA model and show that, in this regime, the number of domain walls does not scale in the standard way if the initial conditions have a sufficiently high background charge. Instead of forming loops of domain wall, we find that, within the constraints of dynamic range, the network appears to be moving toward a glass-like configuration. We find that the results are independent of the dimension of the hyper-cube.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑