论文标题
instantons且无蠕虫$ ads_3 \ times s^3 \ times cy_2 $
Instantons and no wormholes in $AdS_3\times S^3 \times CY_2$
论文作者
论文摘要
我们研究由euclidean $ ads_3 \ times s^3 \ times cy_2 $ cy_2 $ vacua of iib supergravity的axion（和saxion）字段提出的超级激体。这样的激体曲线在模量空间上描述。定时的大地测量学可以描述欧几里得虫洞，灯光般的大地测量学描述（概括）d-instantons和Spacelike Geodesics是其亚超级版本。我们对这种地球学的具体分类进行了具体分类，发现尽管提到了较早的说法，但虫洞并未定期。光线般的测量学的一个子类是超对称性的，直到二元性，将欧几里得琴弦抬到Cy $ _2 $中的2个循环。预计这些Instantons的双重是D1-D5 CFT的世界表Istantons。
We study supergravity instantons sourced by axion (and saxion) fields in the Euclidean $AdS_3\times S^3 \times CY_2$ vacua of IIB supergravity. Such instantons are described by geodesic curves on the moduli space; the timelike geodesics can describe Euclidean wormholes, the lightlike geodesics describe (generalisations of) D-instantons and spacelike geodesics are sub-extremal versions thereof. We perform a concrete classification of such geodesics and find that, despite earlier claims, the wormholes fail to be regular. A subclass of the lightlike geodesics is supersymmetric and, up to dualities, lift to Euclidean strings wrapping 2-cycles in the CY$_2$. The dual of these instantons are expected to be worldsheet instantons of the D1-D5 CFT.
