arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1002.3638hep-th
收藏

二维越壁、R-扭曲和超对称指数

2d Wall-Crossing, R-twisting, and a Supersymmetric Index

Sergio Cecotti, Cumrun Vafa

摘要:

从N=2的二维超对称理论出发,建立了一个新的含时超对称量子理论,其中R-电荷随时间扭曲。超对称指数在这些理论的作用量变化下的不变性导致了两个预测:在IR极限下,它预测了BPS态的简并度如何随着我们穿过边缘稳定性的墙而变化。另一方面,它与UV极限的等价性将其与共形点处Ramond基态的U(1)R-电荷的光谱联系起来。这导致了一个概念上简单的推导结果,以前使用tt* 几何,现在基于时间相关的超对称量子力学。

英文摘要:

Starting from N=2 supersymmetric theories in 2 dimensions, we formulate a novel time-dependent supersymmetric quantum theory where the R-charge is twisted along the time. The invariance of the supersymmetric index under variations of the action for these theories leads to two predictions: In the IR limit it predicts how the degeneracy of BPS states change as we cross the walls of marginal stability. On the other hand, its equivalence with the UV limit relates this to the spectrum of the U(1) R-charges of the Ramond ground states at the conformal point. This leads to a conceptually simple derivation of results previously derived using tt* geometry, now based on time-dependent supersymmetric quantum mechanics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑