论文标题
分数晶体的表面缺陷-II
Surface Defects from Fractional Branes -- II
论文作者
论文摘要
$ {\ MATHCAL N} = 4 $ SUPERSMMETRIC U $（N）$ YANG-MILLS理论的通用半BPS表面缺陷由$ n = n_1 + \ ldots + n_m $和一组400万美元的$ $ clotinun contariun参数描述。我们表明，在$ \ mathbb {z} _M $ orbifold背景上，$ n_i $ branes中的$ n_i $ stacks可以实现这种缺陷，其中Brane World-volume沿着Orbifold方向部分扩展。在此设置中，我们表明$ 400万$连续参数对应于Orbifold的某些扭曲闭合字符串的常数背景值。这些结果扩展并概括了我们在上一篇论文中为简单缺陷所提出的内容。
A generic half-BPS surface defect of ${\mathcal N}=4$ supersymmetric U$(N)$ Yang-Mills theory is described by a partition of $N = n_1 + \ldots + n_M$ and a set of $4M$ continuous parameters. We show that such a defect can be realized by $n_I$ stacks of fractional D3-branes in Type II B string theory on a $\mathbb{Z}_M$ orbifold background in which the brane world-volume is partially extended along the orbifold directions. In this set up we show that the $4M$ continuous parameters correspond to constant background values of certain twisted closed string scalars of the orbifold. These results extend and generalize what we have presented for the simple defects in a previous paper.
