标题： AdS/CFT中的螺旋磁场引起的手性对称性破缺与恢复 显示英文标题

标题： Chiral symmetry breaking and restoration by helical magnetic fields in AdS/CFT

摘要： 我们利用D3/D7膜模型，在AdS/QCD框架下研究了螺旋磁场对手征对称性破缺的影响。通过对膜嵌入的分析，我们得到了三种无质量解，分别对应于对偶场论中具有不同行为的三个相。从夸克凝聚态、自由能和电流传导的研究中，我们发现螺旋磁场可以抵消均匀场引起的对称性破缺，促使系统趋向于对称恢复。我们还发现了一种类似于手征磁效应的现象，即电流与磁场平行。我们进一步研究了有质量的情况，发现螺旋结构在消除常值磁场情况下存在的一级相变方面效果较差。 显示英文摘要

摘要： We study the effects of helical magnetic fields on chiral symmetry breaking within the AdS/QCD framework using the D3/D7-brane model. By analyzing the brane embeddings, we obtain three types of massless solutions, corresponding to three phases with different behavior in the dual field theory. From the study of quark condensates, free energy, and electric currents, we find that helical magnetic fields can counteract uniform-field-induced symmetry breaking, driving the system towards symmetry restoration. We also find an effect analog to the chiral magnetic effect whereby the current is parallel to the magnetic field. We further study the massive case, and find that the helical configuration is less effective in erasing the first order phase transition that is present in the case of a constant magnetic field.