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arXiv 1306.5146hep-thgr-qc
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具有四次势的非阿贝尔Chern-Simons-Higgs涡旋

Non-Abelian Chern-Simons-Higgs vortices with a quartic potential

J. L. Blazquez-Salcedo, L. M. Gonzalez-Romero, F. Navarro-Lerida, D. H. Tchrakian

摘要:

我们在SU(2)Chern-Simons-Higgs理论中用数值方法构造了四次Higgs势的非阿贝尔涡旋。我们通过改进的数值代码对这些解进行了详细的分析,发现了一些我们在使用六阶Higgs势时没有发现的意想不到的特征。一般的非阿贝尔解是通过使用它们相应的阿贝尔对应作为初始猜测而产生的。通常,非阿贝尔解的能量低于相应的阿贝尔解的能量(除了在参数空间的某些区域)。关于角动量,阿贝尔解具有最大值,尽管也存在达到该最大值的非阿贝尔解。为了对解进行分类,考虑规范势的$A_t$分量渐近为零的非阿贝尔解是有用的,它可以用整数$m$来标记。对于涡数$n=3$及以上,我们发现了唯一性破坏:两个不同的非阿贝尔解,所有的整体电荷相等。最后,我们研究了无穷大Higgs自耦合参量的极限,发现了能量与角动量之间的分段Regge关系。

英文摘要:

We have constructed numerically non-Abelian vortices in an SU(2) Chern-Simons-Higgs theory with a quartic Higgs potential. We have analyzed these solutions in detail by means of improved numerical codes and found some unexpected features we did not find when a sixth-order Higgs potential was used. The generic non-Abelian solutions have been generated by using their corresponding Abelian counterparts as initial guess. Typically, the energy of the non-Abelian solutions is lower than that of the corresponding Abelian one (except in certain regions of the parameter space). Regarding the angular momentum, the Abelian solutions possess the maximal value, although there exist non-Abelian solutions which reach that maximal value too. In order to classify the solutions it is useful to consider the non-Abelian solutions with asymptotically vanishing $A_t$ component of the gauge potential, which may be labelled by an integer number $m$. For vortex number $n=3$ and above, we have found uniqueness violation: two different non-Abelian solutions with all the global charges equal. Finally, we have investigated the limit of infinity Higgs self-coupling parameter and found a piecewise Regge-like relation between the energy and the angular momentum.

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