Hawking radiation in large N strongly coupled field theories
Hawking radiation in large N strongly coupled field theories
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DOI：
10.1088/0264-9381/27/9/095015
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发表时间：
2009-08
影响因子：
3.5
通讯作者：
V. Hubeny;D. Marolf;Mukund Rangamani
中科院分区：
文献类型：
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作者：
V. Hubeny;D. Marolf;Mukund Rangamani
我们考虑黑洞背景下的大N强耦合场理论。在足够高的霍金温度TH下，人们期望黑洞与解除限制的等离子体处于平衡状态。我们探讨这一阶段的背景下，广告/CFT的对应关系，并认为可能会导致两种可能的行为。在给定的霍金温度TH下，大黑洞背景的场论将导致与黑洞强烈相互作用的等离子体。这样的情况将是对偶的新体时空有一个单一的连接视界，我们称之为黑色漏斗。我们构建的例子，在低时空维度的不同类别的场论黑洞的黑漏斗。在这种情况下，扰动平衡态导致场论与黑洞以典型的通过非受限等离子体传导的速率交换热量。与此相反，我们认为，由于等离子体激发的物理尺寸有限，较小的黑洞将只弱耦合到场论激发。这种情况是双重的散装解决方案，其中包含两个断开的地平线，仍然有待建设。在这里，扰动导致热交换的水平典型的限制阶段，即使TH仍然远远高于任何解除限制过渡。至少在大N和强耦合下，这两种行为被急剧的转变分开。我们的研究结果还表明，膜世界黑洞的种类比迄今预期的要丰富。
We consider strongly coupled field theories at large N on black hole backgrounds. At sufficiently high Hawking temperature TH, one expects a phase where the black hole is in equilibrium with a deconfined plasma. We explore this phase in the context of the AdS/CFT correspondence and argue that two possible behaviors may result. At a given Hawking temperature TH, field theories on large black hole backgrounds will result in a plasma that interacts strongly with the black hole. Such cases will be dual to novel bulk spacetimes having a single connected horizon which we dub black funnels. We construct examples of black funnels in low spacetime dimensions for different classes of field theory black holes. In this case, perturbing the equilibrium state results in the field theory exchanging heat with the black hole at a rate typical of conduction through deconfined plasma. In contrast, we argue that due to the finite physical size of plasma excitations, smaller black holes will couple only weakly to the field theory excitations. This situation is dual to bulk solutions containing two disconnected horizons which remain to be constructed. Here perturbations lead to heat exchange at a level typical of confined phases, even when TH remains far above any deconfinement transition. At least at large N and strong coupling, these two behaviors are separated by a sharp transition. Our results also suggest a richer class of braneworld black holes than hitherto anticipated.