Heterotic-type IIA duality and degenerations of K3 surfaces

Heterotic-type IIA duality and degenerations of K3 surfaces
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杂种优势型IIA二元性和K3表面的退化

DOI:
10.1007/jhep08(2016)034
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发表时间:
2016
影响因子:
5.4
通讯作者:
Braun A
Braun A
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Braun A

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我们研究四维= 2紧化的杂种优势和IIA型弦理论之间的对偶性。通过六维对偶的绝热纤维化,在K3-紧的Calabi-Yau三重上紧化的IIA型弦理论具有潜在的杂种对偶紧化。每当K3纤维在纤维化底部的点上退化为多个分量时,这种绝热图像就会失败。单值性的指导下,我们确定这种退化的K3纤维孤子推广的NS 5膜的杂合弦理论。然后,可以使用K3表面的退化理论来发现哪些孤子可以存在于杂波侧。类似于小瞬子跃迁,这些孤子护送不同卡-丘三重态之间的奇异跃迁。从著名的杂合IIA型对偶的例子出发,这样的转换可以把我们带到具有未知杂合数的IIA型紧化。
We study the duality between four-dimensional= 2 compactifications of heterotic and type IIA string theories. Via adiabatic fibration of the duality in six dimensions, type IIA string theory compactified on a K3-fibred Calabi-Yau threefold has a potential heterotic dual compactification. This adiabatic picture fails whenever the K3 fibre degenerates into multiple components over points in the base of the fibration. Guided by monodromy, we identify such degenerate K3 fibres as solitons generalizing the NS5-brane in heterotic string theory. The theory of degenerations of K3 surfaces can then be used to find which solitons can be present on the heterotic side. Similar to small instanton transitions, these solitons escort singular transitions between different Calabi-Yau threefolds. Starting from well-known examples of heterotic-type IIA duality, such transitions can take us to type IIA compactifications with unknown heterotic duals.
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