期刊
SCIPOST PHYSICS
卷 12, 期 1, 页码 -出版社
SCIPOST FOUNDATION
DOI: 10.21468/SciPostPhys.12.1.001
关键词
-
资金
- DFG [273811115, SFB 1225]
- Science and Technology Research Council (STFC) [ST/T00102X/1]
- DFG under Germany's Excellence Strategy [EXC-2181/1-390900948]
We reconstruct the Lorentzian graviton propagator in asymptotically safe quantum gravity from Euclidean data. The positive spectral function of the dynamical graviton suggests the unitarity of asymptotically safe quantum gravity, while the negative parts in the spectral function of the background graviton are similar to the gluon spectral function.
We reconstruct the Lorentzian graviton propagator in asymptotically safe quantum gravity from Euclidean data. The reconstruction is applied to both the dynamical fluctuation graviton and the background graviton propagator. We prove that the spectral function of the latter necessarily has negative parts similar to, and for the same reasons, as the gluon spectral function. In turn, the spectral function of the dynamical graviton is positive. We argue that the latter enters cross sections and other observables in asymptotically safe quantum gravity. Hence, its positivity may hint at the unitarity of asymptotically safe quantum gravity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据