标题： 各向异性等离子体中的全息输运 显示英文标题

标题： Holographic transport in anisotropic plasmas

摘要： 我们通过对比三种不同的全息方法来计算输运系数，研究在各向异性热态中强相互作用全息量子场理论中的能量-动量和电荷输运：标准全息计算滞后格林函数的方法，基于视界附近零聚焦方程的方法以及基于背景变化的新型方法。 利用这些方法，我们计算了由外部引入的各向异性（例如外部磁场）引起的各向异性剪切粘度和体积粘度以及电导率。 我们证明了所有三种方法都得出一致的结果。 该新方法使我们能够从视界数据中读取输运系数，并以解析形式表达它们，从而推导出它们之间的普遍关系。 此外，我们将基于零聚焦方程的方法扩展到高斯-博内理论，以计算上述输运系数的高阶导数修正。 显示英文摘要

摘要： We study energy-momentum and charge transport in strongly interacting holographic quantum field theories in an anisotropic thermal state by contrasting three different holographic methods to compute transport coefficients: standard holographic calculation of retarded Greens functions, a method based on the null-focusing equation near horizon and the novel method based on background variations. Employing these methods we compute anisotropic shear and bulk viscosities and conductivities with anisotropy induced externally, for example by an external magnetic field. We show that all three methods yield consistent results. The novel method allows us to read off the transport coefficients from the horizon data and express them in analytic form from which we derive universal relations among them. Furthermore we extend the method based on the null-focusing equation to Gauss-Bonnet theory to compute higher derivative corrections to the aforementioned transport coefficients.