关于Sen极限的平方
On the Sen limit squared
摘要：
我们介绍了一类F-理论真空，它可以被看作是一个专门的所谓的$E_6$纤维化，并构建了一个弱耦合限制与这样的真空，我们认为是'平方'的森极限。我们发现，虽然森的极限是自然地被视为一个orientifold理论，普遍的蝌蚪关系，等同于D3之间的相关F-理论紧化和限制，我们建设的收费表明，也许极限理论实际上是一个导向理论紧化的基础上的F-理论椭圆纤维化。
英文摘要：
We introduce a class of F-theory vacua which may be viewed as a specialization of the so-called $E_6$ fibration, and construct a weak coupling limit associated with such vacua which we view as the `square' of the Sen limit. We find that while Sen's limit is naturally viewed as an orientifold theory, the universal tadpole relation which equates the D3 charge between the associated F-theory compactification and the limit we construct suggests that perhaps the limiting theory is in fact an oriented theory compactified on the base of the F-theory elliptic fibration.
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