Electrical conductivity and charge diffusion in thermal QCD from the lattice
Electrical conductivity and charge diffusion in thermal QCD from the lattice
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DOI：
10.1007/jhep02(2015)186
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发表时间：
2015-02-27
影响因子：
5.4
通讯作者：
Shuiierd, Jon-Ivar
中科院分区：
文献类型：
--
作者：
Aarts, Gert;Alton, Chris;Shuiierd, Jon-Ivar
我们提出了一个晶格QCD计算的电荷扩散系数，电导率和各种守恒电荷的磁化率，在一个温度范围内低于和高于解除限制交叉。计算包括了上夸克、下夸克和奇异夸克的贡献。我们发现，扩散系数是1/（2 π T）的顺序，并有一个跨越温度附近的下降。我们的结果得到了晶格模拟包含2 + 1动力学味各向异性晶格。最大熵方法被用来构造谱函数的守恒矢量流的分解。
We present a lattice QCD calculation of the charge diffusion coefficient, the electrical conductivity and various susceptibilities of conserved charges, for a range of temperatures below and above the deconfinement crossover. The calculations include the contributions from up, down and strange quarks. We find that the diffusion coefficient is of the order of 1/(2 pi T) and has a dip around the crossover temperature. Our results are obtained with lattice simulations containing 2 + 1 dynamical flavours on anisotropic lattices. The Maximum Entropy Method is used to construct spectral functions from correlators of the conserved vector current.