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arXiv 2104.00713hep-th
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再论精化开拓扑弦

Refined open topological strings revisited

Shi Cheng, Piotr Sułkowski

摘要:

在这项工作中,我们从几个角度验证了精细拓扑弦论的一致性。首先,我们提出了通过几何变换计算精细开幅的方法。基于这样的计算,我们表明,完善的开放BPS不变量是非负整数的一个大类的复曲面Calabi-Yau三倍:一个无限类的带状几何,封闭的拓扑顶点几何,和一些三倍紧凑的四个周期。此外,对于一个无限类的环面几何没有紧凑的四个循环,我们表明,细化开弦振幅的形式的生成级数。这推广了先前在未精化情形中发现的箭图的关系,暗示了精化开BPS态是由有限个基本BPS态组成的,并断言所有与给定膜相关的精化开BPS不变量都是非负整数,因为它们与(整数和非负)motivic Donaldson-Thomas不变量有关。因此,对称弦的动机唐纳森-托马斯不变量的非负性在精炼开拓扑弦的上下文中是至关重要的。此外,重新解释这些结果的五膜的网络,我们分析Hanany-Witten过渡的新配置涉及拉格朗日膜。

英文摘要:

In this work we verify consistency of refined topological string theory from several perspectives. First, we advance the method of computing refined open amplitudes by means of geometric transitions. Based on such computations we show that refined open BPS invariants are non-negative integers for a large class of toric Calabi-Yau threefolds: an infinite class of strip geometries, closed topological vertex geometry, and some threefolds with compact four-cycles. Furthermore, for an infinite class of toric geometries without compact four-cycles we show that refined open string amplitudes take form of quiver generating series. This generalizes the relation to quivers found earlier in the unrefined case, implies that refined open BPS states are made of a finite number of elementary BPS states, and asserts that all refined open BPS invariants associated to a given brane are non-negative integers in consequence of their relation to (integer and non-negative) motivic Donaldson-Thomas invariants. Non-negativity of motivic Donaldson-Thomas invariants of a symmetric quiver is therefore crucial in the context of refined open topological strings. Furthermore, reinterpreting these results in terms of webs of five-branes, we analyze Hanany-Witten transitions in novel configurations involving lagrangian branes.

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