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arXiv 1904.04848hep-th
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瞬子和无限距离

Instantons and infinite distances

Fernando Marchesano, Max Wiesner

摘要:

本文研究了II型Calabi-Yau紧化的(经典)超多重模空间中无限长的测地线和常数4d子。当接近这样的无限远点时,大量的D-瞬子发展出指数抑制的作用,实质上修改了模空间度量。我们考虑一个特定的大体积/强耦合的轨迹,在校正的度量,路径长度变得有限。瞬子效应也改变了经典的四维普朗克介子,为了保持四维普朗克质量有限,弦标度必须降低。我们的结果可以通过c-映射与向量多重模空间中讨论沼泽地距离猜想和涌现猜想的无穷远点周围的物理联系起来,并为它们提供进一步的证据.

英文摘要:

We consider geodesics of infinite length and constant 4d dilaton in the (classical) hypermultiplet moduli space of type II Calabi-Yau compactifications. When approaching such infinite distance points, a large amount of D-instantons develop an exponentially suppressed action, substantially modifying the moduli space metric. We consider a particular large volume/strong coupling trajectory for which, in the corrected metric, the path length becomes finite. The instanton effects also modify the cllassical 4d dilaton such that, in order to keep the 4d Planck mass finite, the string scale has to be lowered. Our results can be related, via the c-map, to the physics around points of infinite distance in the vector multiplet moduli space where the Swampland Distance Conjecture and the Emergence Proposal have been discussed, and provide further evidence for them.

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