DESY Hamburg, Theory Group, Notkestrasse 85, D-22607 Hamburg, Germany.
Phys Rev Lett. 2011 May 27;106(21):211601. doi: 10.1103/PhysRevLett.106.211601. Epub 2011 May 23.
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.
我们将 STU 模型视为具有多个反常 U(1)电流的强耦合等离子体的引力对偶。在体相中，我们添加额外的背景规范场来包括等离子体对外电场和磁场的影响。将 STU 模型中的化学势数量减少到两个，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。这些效应在电磁电流中形式上表现为一阶输运系数。我们使用流体-引力对偶从我们的模型中计算这些系数。我们还在轴矢电流中发现了类似的效应。最后，我们简要讨论了我们模型的一个变体，其中 CME/CVE 在手征等离子体的膨胀动力学的后期表现出来。
