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arXiv 1408.3296hep-thgr-qc
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弦与自旋在双轨道上的比较

Strings vs Spins on the Null Orbifold

K. Surya Kiran, Chethan Krishnan, Ayush Saurabh, Joan Simon

摘要:

本文利用高自旋理论和弦论研究了2+1维平坦空间中的零轨道奇异性。使用2+1 d爱因斯坦引力的陈-西蒙斯公式,我们首先观察到,尽管这种几何的奇异性,其陈-西蒙斯holonomy的本征值是平凡的。接下来,我们构造了更高自旋理论中奇异性的解析:具有消失的标量曲率不变量的孔特时空。我们还指出,紫外发散以前观察到的2至2快子树水平弦振幅的零orbifold不出现在$α^\prime\to \infty$限制。我们发现所有的振幅的发散,并表明,在无张力极限的剩余的物理IR型发散。最后,我们讨论了更高自旋(宇宙学)奇点分辨率的意义和局限性,以及它与弦论的潜在联系。

英文摘要:

We study the null orbifold singularity in 2+1 d flat space higher spin theory as well as string theory. Using the Chern-Simons formulation of 2+1 d Einstein gravity, we first observe that despite the singular nature of this geometry, the eigenvalues of its Chern-Simons holonomy are trivial. Next, we construct a resolution of the singularity in higher spin theory: a Kundt spacetime with vanishing scalar curvature invariants. We also point out that the UV divergences previously observed in the 2-to-2 tachyon tree level string amplitude on the null orbifold do not arise in the $α^\prime\to \infty$ limit. We find all the divergences of the amplitude and demonstrate that the ones remaining in the tensionless limit are physical IR-type divergences. We conclude with a discussion on the meaning and limitations of higher spin (cosmological) singularity resolution and its potential connection to string theory.

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。

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