A chiral magnetic spiral in the holographic Sakai-Sugimoto model

被引：26

作者：

Ballon-Bayona, Alfonso ^{[1
]}

Peeters, Kasper ^{[1
]}

Zamaklar, Marija ^{[1
]}

机构：

[1] Univ Durham, Dept Math Sci, Durham DH1 3LE, England

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2012年 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

Gauge-gravity correspondence; AdS-CFT Correspondence;

D O I：

10.1007/JHEP11(2012)164

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We investigate the effect of a magnetic field on the vacuum of low-temperature QCD at large-Ne in the presence of a chiral chemical potential, using the holographic Sakai-Sugimoto model. Above some critical chemical potential we find an instability, which triggers a decay of the homogeneous vacuum to a non-homogeneous configuration with a spiral form, which we construct explicitly. We find that this decay is suppressed for sufficiently large magnetic field, and determine the critical strength. We find that the new vacuum does not exhibit the chiral magnetic effect. This is related to the way the chiral chemical potential is introduced. We discuss an alternative way of introducing the chiral chemical potential that leads to a nonzero chiral magnetic effect.

引用

页数：36