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arXiv 0905.2969hep-thhep-ph
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全息输运系数的普遍关系

Universal relations of transport coefficients from holography

Aleksey Cherman, Abhinav Nellore

摘要:

我们表明,有普遍的高温等离子体的输运系数的关系所描述的广泛的一类场论与重力场。这些理论可以被看作是强耦合的大Nc共形场论变形的一个或多个相关的运营商。我们研究的输运系数是声速和体积粘度,以及电导率,扩散系数和探针U(1)电荷的电荷磁化率。我们证明了这些理论在高温下满足声边界v_s^2 <= 1/3,并讨论了扩散系数、电导率和体粘滞系数的边界。

英文摘要:

We show that there are universal high-temperature relations for transport coefficients of plasmas described by a wide class of field theories with gravity duals. These theories can be viewed as strongly coupled large-Nc conformal field theories deformed by one or more relevant operators. The transport coefficients we study are the speed of sound and bulk viscosity, as well as the conductivity, diffusion coefficient, and charge susceptibility of probe U(1) charges. We show that the sound bound v_s^2 <= 1/3 is satisfied at high temperatures in these theories and also discuss bounds on the diffusion coefficient, the conductivity and the bulk viscosity.

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