Fluid-gravity model for the chiral magnetic effect.
Fluid-gravity model for the chiral magnetic effect.
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DOI：
10.1103/physrevlett.106.211601
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发表时间：
2011-02
影响因子：
8.6
通讯作者：
T. Kalaydzhyan;I. Kirsch
中科院分区：
文献类型：
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作者：
T. Kalaydzhyan;I. Kirsch
我们将STU模型看作具有多个反常U(1)流的强耦合等离子体的引力对偶。在整体上，我们增加了额外的背景规场，以包括外部电场和磁场对等离子体的影响。将STU模型中的化学势减少到两个，并将它们解释为夸克和手征化学势，我们得到了相对论重离子碰撞中手征磁效应和手征涡效应(CME和CVE)的全息描述。这些效应在形式上表现为电磁电流中的一阶输运系数。我们使用流体-重力二象性从我们的模型计算这些系数。我们在轴向矢量电流中也发现了类似的效应。最后，我们简要地讨论了我们的模型的一种变体，其中CME/CVE是在膨胀等离子体的后期动力学中实现的。
We consider the STU model as a gravity dual of a strongly coupled plasma with multiple anomalous U(1) currents. In the bulk we add additional background gauge fields to include the effects of external electric and magnetic fields on the plasma. Reducing the number of chemical potentials in the STU model to two and interpreting them as quark and chiral chemical potential, we obtain a holographic description of the chiral magnetic and chiral vortical effects (CME and CVE) in relativistic heavy-ion collisions. These effects formally appear as first-order transport coefficients in the electromagnetic current. We compute these coefficients from our model using fluid-gravity duality. We also find analogous effects in the axial-vector current. Finally, we briefly discuss a variant of our model, in which the CME/CVE is realized in the late-time dynamics of an expanding plasma.