Chiral spiral induced by a strong magnetic field
Chiral spiral induced by a strong magnetic field
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DOI：
10.1051/epjconf/201612900036
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发表时间：
2016-09
期刊：
影响因子：
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通讯作者：
H. Abuki
中科院分区：
文献类型：
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作者：
H. Abuki
研究了外加磁场对QCD手性相结构的影响。我们首先演示了磁场效应如何系统地纳入广义的金兹堡-朗道框架。然后我们分析了手性临界点附近的相结构。在手性极限中，发现这种影响是如此剧烈，以至于它完全从相图中洗掉了三临界点，为手性螺旋带来了大陆。无论磁场强度有多小，情况都是如此。另一方面，当前的夸克质量保护手性临界点不受弱磁场的影响。然而，随着磁场的增大，临界点最终会被手性螺旋相所覆盖。
We study the modification of the chiral phase structure of QCD due to an external magnetic field. We first demonstrate how the effect of magnetic field can systematically be incorporated into a generalized Ginzburg-Landau framework. We then analyze the phase structure in the vicinity of the chiral critical point. In the chiral limit, the effect is found to be so drastic that it totally washes the tricritical point out of the phase diagram, bringing the continent for the chiral spiral. This is the case no matter how small is the intensity of the magnetic field. On the other hand, the current quark mass protects the chiral critical point from a weak magnetic field. However the critical point will eventually be covered by the chiral spiral phase as the magnetic field grows.