3 papers
gr-qc2026
From harmonic to Newman-Unti coordinates at the second post-Minkowskian order
Pujian Mao, Baijun Zeng
In this paper, we present the complete transformations of a generic metric from (generalized) harmonic to Newman-Unti coordinates up to the second post-Minkowskian order . T…
gr-qc2025
Note on post-Minkowskian expansion and Bondi coordinates
Pujian Mao, Baijun Zeng
In this note, we transform the linear order (at order ) metric from a system of pointlike bodies source in the post-Minkowskian expansion to the Bondi coordinates. We show that…
gr-qc2025
Supertranslation ambiguity in post-Minkowskian expansion
Pujian Mao, Baijun Zeng
The supertranslation ambiguity of angular momentum is a long-standing problem in general relativity, which arises the puzzle of the angular momentum loss in the post-Minkowskian (P…