论文标题
奇怪的夸克质量将磁性域墙变成多随着的通量管
Strange quark mass turns magnetic domain walls into multi-winding flux tubes
论文作者
论文摘要
预计密集的夸克物质将以强耦合的形式作为II型超导体。先前显示的是，如果忽略了奇怪的夸克质量$ m_s $，则所谓2Sc相中的磁性域壁是特定参数区域中的能量优选的磁性缺陷。在Ginzburg-Landau方法中计算通量管曲线和相关的自由能，当$ M_S $增加时，我们发现一系列级联的多翼通量管是域墙的“残余”。这些通量管表现出磁场的非常规环状结构。我们表明，绕线数大于一个的通量管，$ m_s $的值可生存，最高为夸克化学势的20％。这使得它们不太可能在紧凑型恒星中发挥重要作用，但是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.
