Large-N bounds on, and compositeness limit of, gauge and gravitational interactions
Large-N bounds on, and compositeness limit of, gauge and gravitational interactions
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规范和引力相互作用的大 N 界限和复合极限
DOI：
10.1088/1126-6708/2002/06/051
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发表时间：
2001
影响因子：
5.4
通讯作者：
G. Veneziano
中科院分区：
文献类型：
--
作者：
Gabriele Veneziano;G. Veneziano
在玩具模型的规范和引力相互作用的D？四维，具有不变的紫外线截止值，和包含大量的N个非自我相互作用的物质物种，物理规范和引力耦合在截止，？g？g2？D呢？4、？G？GN？D？2，被证明是有界的适当权力的1/N。这意味着这些理论的无限裸耦合（所谓的复合性）极限是光滑的，甚至可以类似于我们的世界。我们认为，这样的结果，当扩展到更现实的情况下，可以帮助避免大N违反熵界，解决超弦理论中的量子稳定性和大统一体尺度问题，并提供了一个新的可能的候选人的精髓。
In a toy model of gauge and gravitational interactions in D ? 4 dimensions, endowed with an invariant UV cut-off ?, and containing a large number N of non-self-interacting matter species, the physical gauge and gravitational couplings at the cut-off, ?g?g2?D?4 and ?G?GN?D?2, are shown to be bounded by appropriate powers of 1/N. This implies that the infinite-bare-coupling (so-called compositeness) limit of these theories is smooth, and can even resemble our world. We argue that such a result, when extended to more realistic situations, can help avoid large-N violations of entropy bounds, solve the dilaton stabilization and GUT-scale problems in superstring theory, and provide a new possible candidate for quintessence.