Magnetic catalysis in hot and dense quark matter and quantum fluctuations
Magnetic catalysis in hot and dense quark matter and quantum fluctuations
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DOI：
10.1103/physrevd.86.076013
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发表时间：
2012-03
影响因子：
5
通讯作者：
K. Fukushima;J. Pawlowski
中科院分区：
文献类型：
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作者：
K. Fukushima;J. Pawlowski
我们分析了零和有限温度和夸克化学势下外部磁场中夸克物质的手性对称性破缺。我们首先简要概述平均场近似内的分析结果。在那里，磁场效应提高了手性恢复的临界温度。然后我们研究物质和量子涨落对磁催化的影响。更具体地说，我们计算了存在量子涨落的情况下零夸克和有限夸克化学势的临界耦合作为磁场和温度的函数。一旦打开非零温度和/或密度，就会屏蔽长程相关性，并且临界耦合不再消失。我们将动力学结果扩展到导致非局部四费米耦合的前导气泡恢复之外。这包括更定量水平上的介质介子效应。
We analyze chiral symmetry breaking in quark matter in an external magnetic field at zero and finite temperature and quark chemical potential. We first give a brief overview of analytic results within the mean-field approximation. There the critical temperature for chiral restoration is increased by the magnetic field effect. Then we investigate the effects of matter and quantum fluctuations on the Magnetic Catalysis. More specifically, we compute the critical coupling as a function of the magnetic field and the temperature for zero and finite quark chemical potential in the presence of quantum fluctuations. As soon as a non-zero temperature and/or density is turned on, long-range correlations are screened and the critical coupling is no longer vanishing. We extend our dynamical results beyond the leading-order bubble resummation which results in a non-local four-Fermi coupling. This includes in-medium meson effects on the more quantitative level.