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arXiv 2009.01141hep-phcond-mat.supr-connucl-th
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奇异夸克质量使磁畴壁变成多绕组通量管

Strange quark mass turns magnetic domain walls into multi-winding flux tubes

Geraint W. Evans, Andreas Schmitt

摘要:

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$m_s$,在一定的参数范围内,所谓的2SC相中的磁畴壁是能量优先的磁缺陷。在Ginzburg-Landau方法中计算通量管剖面和相关的自由能,当$m_s$增加时,我们发现多绕组通量管的级联作为畴壁的“残余物”。这些通量管呈现出非常规的磁场环状结构。我们表明,磁通管的绕组数大于一个生存的值$m_s$高达约20%的夸克化学势。这使得它们不太可能在致密星中扮演重要角色,但它们可能在外部磁场存在的情况下出现在QCD相图中。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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