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arXiv 1202.2161hep-thhep-phnucl-th
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外磁场中强耦合N=4 SYM等离子体中的Chern-Simons扩散速率

The Chern-Simons diffusion rate in strongly coupled N=4 SYM plasma in an external magnetic field

Gokce Basar, Dmitri E. Kharzeev

摘要:

利用全息对应方法计算了在外加恒定$U(1)_R$磁通量作用下强耦合N=4超对称杨-米尔斯等离子体中的Chern-Simons扩散速率.由于带电场和非阿贝尔规范场之间的强相互作用,外部阿贝尔磁场影响热杨-米尔斯动力学,并增加扩散速率,无论其强度如何。得到了强、弱磁场极限下Chern-Simons扩散率的解析结果。在后者的限制,我们表明,扩散率的规模为$B\times T^2$,这可以理解为一个动态降维的结果。

英文摘要:

We calculate the Chern-Simons diffusion rate in a strongly coupled N=4 SUSY Yang-Mills plasma in the presence of a constant external $U(1)_R$ magnetic flux via the holographic correspondence. Due to the strong interactions between the charged fields and non-Abelian gauge fields, the external Abelian magnetic field affects the thermal Yang-Mills dynamics and increases the diffusion rate, regardless of its strength. We obtain the analytic results for the Chern-Simons diffusion rate both in the weak and strong magnetic field limits. In the latter limit, we show that the diffusion rate scales as $B\times T^2$ and this can be understood as a result of a dynamical dimensional reduction.

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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