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arXiv 1008.3753hep-phnucl-th
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有限密度和温度下QCD的磁性

Magnetic aspects of QCD at finite density and temperature

Toshitaka Tatsumi

摘要:

在有限密度和有限温度下讨论了QCD的一些磁性方面。在朗道费米液体理论下研究了自发磁化的可能性,阐明了屏蔽效应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。密度波态的出现也讨论了与手征跃迁的关系,其中赝标凝聚体以及标量凝聚体以手征不变的方式呈现空间非均匀的形式。相应地,夸克物质的磁化像自旋密度波一样振荡。在这方面,强子-夸克连续性建议,记住在强子阶段的π凝聚。

英文摘要:

Some magnetic aspects of QCD are discussed at finite density and temperature. Possibility of spontaneous magnetization is studied within Landau Fermi-liquid theory, and the important roles of the screening effects for 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 for the magnetic susceptibility. Appearance of a density-wave state is also discussed in relation to chiral transition, where pseudoscalar condensate as well as scalar one takes a spatially non-uniform form in a chirally invariant way. Accordingly magnetization of quark matter oscillates like spin density wave. A hadron-quark continuity is suggested in this aspect, remembering pion condensation in hadronic phase.

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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