Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Instanton Corrections and Emergent Strings   We study limits of infinite distance in the moduli space of 4d $\mathcal{N} =
2$ string compactifications, in which instanton effects dominate. We first
consider trajectories in the hypermultiplet moduli space of type IIB Calabi-Yau
compactifications. We observe a correspondence between towers of D-brane
instantons and D-brane 4d strings, such that the lighter the string the more
relevant the instanton effects are. The dominant instantons modify the
classical trajectory such that the lightest D-brane string becomes tensionless
even faster, while the other strings are prevented to go below the fundamental
string tension. This lightest string is dual to a fundamental type IIB string
and realises the Emergent String Conjecture. We also consider the vector
multiplet moduli space of type I string theory on $K3 \times T^2$ , where
quantum corrections can also become significant. Naively, we only find
trajectories that correspond to decompactification limits, in apparent
contradiction with the picture obtained in some dual setup.

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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ph
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The categories of this paper are: q-bio
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The categories of this paper are: physics
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The categories of this paper are: econ
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The categories of this paper are: q-alg
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: mtrl-th