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arXiv 2112.09136hep-th
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量子引力中的膜极限

Membrane Limits in Quantum Gravity

Rafael Álvarez-García, Daniel Kläwer, Timo Weigand

摘要:

我们预期,在量子引力的模空间中,无限距离的极限伴随着一个光态之塔。根据突现弦猜想,这座塔必须要么导致解压缩,要么对应于无张力临界弦的出现。我们研究了这个猜想所隐含的关于降维下量子引力渐近行为的相容性条件。如果突现弦是从一个高维理论中的(2+1)维膜下降的,我们发现这样一个膜必须与卡鲁扎-克莱因尺度参数解耦。我们验证了这种审查对紧急膜限制,在那里的膜将坐在卡鲁扎-克莱因尺度,在超多重模空间的卡-丘3倍紧化弦/M-理论。在经典水平上,一个假定的膜极限产生,直到对偶,从一个M5-膜包裹的渐近收缩的特殊拉格朗日3-圈对应的斯特罗明格-丘-Zaslow纤维的卡拉比-丘。我们展示了在模空间中的量子修正是如何阻碍这样的极限的,而不是导致11维的解压缩,其中M5-和M2-膜的作用互换。

英文摘要:

It is expected that infinite distance limits in the moduli space of quantum gravity are accompanied by a tower of light states. In view of the emergent string conjecture, this tower must either induce a decompactification or correspond to the emergence of a tensionless critical string. We study the consistency conditions implied by this conjecture on the asymptotic behavior of quantum gravity under dimensional reduction. If the emergent string descends from a (2+1)-dimensional membrane in a higher-dimensional theory, we find that such a membrane must parametrically decouple from the Kaluza-Klein scale. We verify this censorship against emergent membrane limits, where the membrane would sit at the Kaluza-Klein scale, in the hypermultiplet moduli space of Calabi-Yau 3-fold compactifications of string/M-theory. At the classical level, a putative membrane limit arises, up to duality, from an M5-brane wrapping the asymptotically shrinking special Lagrangian 3-cycle corresponding to the Strominger-Yau-Zaslow fiber of the Calabi-Yau. We show how quantum corrections in the moduli space obstruct such a limit and instead lead to a decompactification to 11 dimensions, where the role of the M5- and M2-branes are interchanged.

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