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arXiv 1012.3561hep-th
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准直辐射全息对偶

Holographic dual of collimated radiation

Veronika E. Hubeny

摘要:

在AdS/CFT对应的框架内,我们提出了一种新的、简单的方法来估计强耦合介质中加速夸克的辐射。特别是,我们提供了一个启发式的解释的准直性质的同步辐射产生的一个回旋夸克,这是最近研究的物理Rev.D81(2010)126001。这种夸克的引力对偶是AdS中的一根盘绕的弦,它对时空几何的反作用仍然受到严格的限制,就好像“光束”射向边界。虽然这似乎与尺度/半径对偶的传统预期相矛盾,但我们通过观察相对论弦的反作用是由引力冲击波的叠加再现来解决这个问题。我们进一步证明,这个建议使我们能够减少计算边界应力张量的问题,仅仅计算测地线在AdS,而不是解决线性化爱因斯坦方程。

英文摘要:

We propose a new and simple method of estimating the radiation due to an accelerated quark in a strongly coupled medium, within the framework of the AdS/CFT correspondence. In particular, we offer a heuristic explanation of the collimated nature of synchrotron radiation produced by a circling quark, which was recently studied in Phys.Rev.D81 (2010) 126001. The gravitational dual of such quark is a coiling string in AdS, whose backreaction on the spacetime geometry remains tightly confined, as if 'beamed' towards the boundary. While this appears to contradict conventional expectations from the scale/radius duality, we resolve the issue by observing that the backreaction of a relativistic string is reproduced by a superposition of gravitational shock waves. We further demonstrate that this proposal allows us to reduce the problem of computing the boundary stress tensor to merely calculating geodesics in AdS, as opposed to solving linearized Einstein's equations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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