Anomalous Electromagnetic Transport in Compact Stars
Anomalous Electromagnetic Transport in Compact Stars
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DOI：
10.3390/universe4030054
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发表时间：
2018-03
期刊：
影响因子：
2.9
通讯作者：
E. J. Ferrer;V. Incera
中科院分区：
文献类型：
--
作者：
E. J. Ferrer;V. Incera
本文研究了在量子色动力学相图的低温/中高密度区存在磁场时，夸克-物质相的反常电磁输运性质。在这个所谓的磁双手性密度波相中，一种非均匀凝聚被动态诱导产生非平凡拓扑，这是准粒子在该相中最低朗道能级模式不对称的结果。非平凡拓扑通过手性异常项θ F μ ν F ~ μ ν表现在电磁有效作用中，其轴子场θ由双手性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，其中包括反常的非耗散霍尔电流，反常电荷，磁电，以及称为轴子极化子的杂化传播模式的形成。中子星内核中可能存在这种相，为寻找其异常输运性质的信号打开了一扇窗。
We study the anomalous electromagnetic transport properties of a quark-matter phase that can be realized in the presence of a magnetic field in the low-temperature/moderate-high-density region of the Quantum Chromodynamics (QCD) phase map. In this so-called Magnetic Dual Chiral Density Wave phase, an inhomogeneous condensate is dynamically induced producing a nontrivial topology, a consequence of the asymmetry of the lowest Landau level modes of the quasiparticles in this phase. The nontrivial topology manifests in the electromagnetic effective action via a chiral anomaly term θ F μ ν F ˜ μ ν , with an 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. The possible existence of this phase in the inner core of neutron stars opens a window to search for signals of its anomalous transport properties.