弹跳奇点的弦论消解
Stringy resolution of bouncing singularities
浏览论文内容
中文总结 AI 辅助
该研究针对近极值NS5膜的近视界几何，利用$SL(2,\mathbb{R})_k/U(1)$陪集的世界面描述，发现有限弦长效应可完全消解超引力极限下的弹跳奇点，且该消解具有非微扰特性。
中文摘要 AI 辅助
我们研究近极值NS5膜的近视界几何，其可通过$SL(2,\mathbb{R})_k/U(1)$陪集获得精确的世界面描述。在超引力极限下，解析延拓的时域反射振幅呈现出与零测地线从黑洞奇点反弹相关的奇点，这与渐近AdS时空中边界关联函数的弹跳奇点类似。我们证明有限弦长效应使该振幅成为复时间的整函数，完全消解了弹跳奇点。这种消解在陪集阶的倒数意义上是非微扰的：在该展开的每一有限阶中，奇点依然存在。
英文摘要
We study the near-horizon geometry of near-extremal NS5 branes, which admits an exact worldsheet description in terms of the $SL(2,\mathbb{R})_k/U(1)$ coset. In the supergravity limit, the analytically continued time-domain reflection amplitude exhibits a singularity associated with a null geodesic bouncing off the black-hole singularity, analogous to the bouncing singularities of boundary correlators in asymptotically AdS spacetimes. We show that finite-string-length effects render this amplitude an entire function of complex time, completely resolving the bouncing singularity. This resolution is nonperturbative in the inverse coset level: the singularity persists at every finite order in the expansion.
发表机构
- School of Mathematics and Hamilton Mathematics Institute, Trinity College, Dublin 2, Ireland（都柏林三一学院数学与汉密尔顿数学研究所）
机构由 AI 辅助整理，请以论文原文为准。
