Strange quark mass turns magnetic domain walls into multi-winding flux tubes
Strange quark mass turns magnetic domain walls into multi-winding flux tubes
复制标题
奇异夸克质量将磁畴壁变成多绕组通量管
DOI：
10.1088/1361-6471/abcb9d
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Evans G
中科院分区：
文献类型：
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作者：
Evans G
稠密夸克物质在强耦合下表现为II型超导体。以前的研究表明，如果忽略奇异夸克质量ms，在所谓的2SC相的磁畴壁是在一定的参数区域的能量优选的磁缺陷。计算的磁通管的档案和相关的自由能内的Ginzburg-Landau的方法，我们发现一个级联的多绕组磁通管作为“残余物”的畴壁时，M的增加。这些磁通管呈现出非常规的环状磁场结构。我们表明，磁通量管绕组数大于一个生存的价值观的M-S高达约20%的夸克化学势。这使得它们不太可能在致密恒星中扮演重要角色，但它们可能在存在外部磁场的情况下出现在QCD相图中。
Dense quark matter is expected to behave as a type-II superconductor at strong coupling. It was previously shown that if the strange quark mass m s is neglected, magnetic domain walls in the so-called 2SC phase are the energetically preferred magnetic defects in a certain parameter region. Computing the flux tube profiles and associated free energies within a Ginzburg–Landau approach, we find a cascade of multi-winding flux tubes as' remnants' of the domain wall when m s is increased. These flux tubes exhibit an unconventional ring-like structure of the magnetic field. We show that flux tubes with winding numbers larger than one survive for values of m s up to about 20% of the quark chemical potential. This makes them unlikely to play a significant role in compact stars, but they may appear in the QCD phase diagram in the presence of an external magnetic field.