Novel topological effects in dense QCD in a magnetic field
Novel topological effects in dense QCD in a magnetic field
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DOI：
10.1016/j.nuclphysb.2018.04.009
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发表时间：
2015-12
影响因子：
2.8
通讯作者：
E. J. Ferrer;V. Incera
中科院分区：
文献类型：
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作者：
E. J. Ferrer;V. Incera
我们研究了在所谓的磁双手征密度波相位下稠密QCD的电磁性质。由于最低朗道能级模的不对称性，这种非均匀相表现出来自费米子扇区的非平凡拓扑。非平凡拓扑通过手征反常项θ F μ ν F <$μ ν表现在电磁有效作用量中，其中动力学轴子场θ由双手征密度波凝聚体的相位给出。轴子与电磁场的耦合导致了几种宏观效应，其中包括异常的非耗散霍尔电流，异常电荷，磁电性以及称为轴子极化子的杂化传播模式的形成。拓扑绝缘体和Weyls半金属的连接，以及重离子碰撞和中子星的可能影响都突出显示。
We study the electromagnetic properties of dense QCD in the so-called Magnetic Dual Chiral Density Wave phase. This inhomogeneous phase exhibits a nontrivial topology that comes from the fermion sector due to the asymmetry of the lowest Landau level modes. The nontrivial topology manifests in the electromagnetic effective action via a chiral anomaly term θ F μ ν F˜ μ ν, with a dynamic axion field θ given by the phase of the Dual Chiral Density Wave condensate. The coupling of the axion with the electromagnetic field leads to several macroscopic effects that include, among others, an anomalous, nondissipative Hall current, an anomalous electric charge, magnetoelectricity, and the formation of a hybridized propagating mode known as an axion polariton. Connection to topological insulators and Weyls semimetals, as well as possible implications for heavy-ion collisions and neutron stars are all highlighted.