4 papers · 1 filter
Covariant variation and its applications
Wen-Bin Liu, Jiang Long
We define a covariant variation of tensor fields by combining its Lie derivative with the metric variation. This operator preserves the metric, contractions, and Hodge duality, but…
Spinning bulk-to-boundary correlators in the massless theories with Poincaré symmetry
Jiang Long, Yu-Xuan Wei, Xin-Hao Zhou
We classify the bulk-to-boundary correlators for general integer-spin operators in a Poincaré-invariant theory by imposing suitable fall-off conditions near future/past null in…
Carrollian correlators in black hole perturbation theory
Jiang Long, Zhan-Jia Qu, Hong-Yang Xiao
In this note, we clarify the relationship between the two-point Carrollian correlator and massless scattering in black hole background. It turns out that there are two kinds of Car…
Constraining bulk-to-boundary correlators under Poincaré symmetry
Jiang Long, Jing-Long Yang
It is well known that a general two-point function cannot be uniquely determined by Poincaré symmetry. In this paper, we show that bulk-to-boundary correlators are highly constrain…