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arXiv 1008.0709hep-phnucl-th
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QCD和致密星的磁性

Magnetic aspects of QCD and compact stars

Toshitaka Tatsumi

摘要:

讨论了夸克物质的磁性。利用单胶子交换作用研究了铁磁相变的可能性。利用朗道费米液体理论计算了磁化率,阐明了屏蔽对胶子传播的重要作用。对纵向胶子的静态屏蔽改善了红外奇异性,而对横向胶子只进行动态屏蔽。后者的属性引起了一种新的非费米液体行为的磁化率。临界密度估计在核密度和居里温度几十MeV左右。本文还讨论了中等密度下的自旋密度波,在中等密度下,手征跃迁变得很重要。赝标凝聚体与标量凝聚体一样,都具有手性不变性的空间非均匀形式。相应地,磁化像自旋密度波一样振荡。这些结果对致密星现象有一定的启示。

英文摘要:

Magnetic properties of quark matter are discussed. The possibility of ferromagnetic transition is studied by using the one-gluon-exchange interaction. Magnetic susceptibility is evaluated within Landau Fermi liquid theory, and the important roles of the screening for the gluon propagation are elucidated. Static screening for the longitudinal gluons improves the infrared singularities, while the transverse gluons receive only dynamic screening. The latter property gives rise to a novel non-Fermi-liquid behaviour in the magnetic susceptibility. The critical density is estimated to be around the nuclear density and the Curie temperature several tens MeV. The spin density wave is also discussed at moderate densities, where chiral transition becomes important. Pseudoscalar condensate as well as scalar one takes a spatially non-uniform form in a chirally invariant way. Accordingly magnetization oscillates like spin density wave. These results should have some implications on compact star phenomena.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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