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arXiv 1012.5996hep-thgr-qc
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真空泡的全息描述

Holographic description of vacuum bubbles

Jaume Garriga

摘要:

我们讨论了真空泡的全息描述,与可能的影响一致的描述的多元宇宙。特别是,我们阐述了最近的观察Maldacena,AdS气泡的内部可以描述的CFT自由度生活在世界表的泡沫壁。我们考虑周围的母真空中的大体积引力子的散射,离开气泡壁。在对偶描述中,透射系数被解释为引力子被世界面CFT自由度吸收的概率。结果与直觉预期一致。共形不变性在此设置中并不精确,并且显示了由于IR和UV截止而导致的主要校正。除了散装散射状态,我们发现,当一个气泡成核内的父dS真空,有一个零模式的引力子描述低维重力与有限的牛顿常数。这种无质量的引力子生活在距离气泡壁一个哈勃半径的范围内。一个完整的全息描述的膨胀的多元宇宙的可能影响进行了简要的讨论。

英文摘要:

We discuss a holographic description of vacuum bubbles, with possible implications for a consistent description of the multiverse. In particular, we elaborate on the recent observation by Maldacena, that the interior of AdS bubbles can be described in terms of CFT degrees of freedom living on the worldsheet of the bubble wall. We consider the scattering of bulk gravitons in the ambient parent vacuum, off the bubble wall. In the dual description, the transmission coefficient is interpreted as the probability that a graviton is absorbed by the worldsheet CFT degrees of freedom. The result is in agreement with intuitive expectations. Conformal invariance is not exact in this setup, and the leading corrections due to the IR and UV cut-offs are displayed. Aside from bulk scattering states, we find that when a bubble nucleates within a parent dS vacuum, there is a zero mode of the graviton which describes lower dimensional gravity with a finite Newton's constant. This massless graviton lives within one Hubble radius away from the bubble wall. Possible implications for a fully holographic description of the inflating multiverse are briefly discussed.

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