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gr-qc2026
Spacelike reduction of the gravitational topological terms and associated helicity densities
Hongxi Huang, Jiang Long, Gan Zhao +1
Helicity in gravity is a multifaceted concept, and several inequivalent definitions exist in the literature. In this work, we reduce the topological Pontryagin and Nieh-Yan terms t…
gr-qc2024
Gravitational helicity flux density from two-body systems
Jiang Long, Run-Ze Yu
The helicity flux density is a novel quantity which characterizes the angle-dependence of the helicity of radiative gravitons and it may be tested by gravitational wave experiments…