Quasicrystals in QCD
Quasicrystals in QCD
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DOI：
10.1007/jhep05(2023)170
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发表时间：
2023-04
影响因子：
5.4
通讯作者：
Z. Qiu;M. Nitta
中科院分区：
文献类型：
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作者：
Z. Qiu;M. Nitta
利用夸克的手性凝聚体假设，研究了低能量密度QCD的基态。在外加磁场作用下，介子可以通过手性异常形成孤子晶格。对于这种情况，我们在手性微扰理论的框架下给出了带U(2)场的介子和η介子的统一描述。结果表明，基态是中性介子π 0和η介子共存时形成的磁化畴壁的混合物。基态的圈数会随着磁场的强度而改变。当磁场较强或化学势较大时，混合物的比例由衰变常数和π 0和η介子的反常作用的贡献决定。所得到的构型要么是混合孤子晶格，要么是可以称为“手性孤子准晶体”的准晶体。
We study the ground state of the low energy dense QCD with the assumption of chiral condensates of quarks. Under an external magnetic field, mesons could form soliton lattices via the chiral anomaly. For such scenarios, we present a unified description of pions and η meson with a U (2) field in the framework of the chiral perturbation theory. Our result shows the ground state is a mixture of the magnetized domain walls formed by neutral pion π 0 and η meson when they coexist. The winding number of the ground state would alter according to the strength of the magnetic field. When the magnetic field is strong or the chemical potential is large, the proportion of the mixture is determined by the decay constants and the contributions to the anomalous action of π 0 and η meson. The resulting configuration is either a mixed soliton lattice or a quasicrystal which could be dubbed a “chiral soliton quasicrystal”.