简化非阿贝尔等离子体的强耦合各向同性
Strong coupling isotropization of non-Abelian plasmas simplified
摘要：
我们研究了均匀的，强耦合的，非阿贝尔等离子体的各向同性通过其重力对偶。我们比较了大量的初始各向异性状态的时间演化，一方面，由完整的非线性爱因斯坦方程，另一方面，由爱因斯坦方程线性化周围的最终平衡态。线性近似即使对于表现出大的各向异性的状态也非常有效。例如，它以20%的准确度预测各向同性化时间，其为t_iso \lesssim 1/T的数量级，其中T为最终平衡温度。我们评论可能的扩展到不对称的情况。
英文摘要：
We study the isotropization of a homogeneous, strongly coupled, non-Abelian plasma by means of its gravity dual. We compare the time evolution of a large number of initially anisotropic states as determined, on the one hand, by the full non-linear Einstein's equations and, on the other, by the Einstein's equations linearized around the final equilibrium state. The linear approximation works remarkably well even for states that exhibit large anisotropies. For example, it predicts with a 20% accuracy the isotropization time, which is of the order of t_iso \lesssim 1/T, with T the final equilibrium temperature. We comment on possible extensions to less symmetric situations.
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