3 papers
hep-th2026
An algebra for covariant observers in de Sitter space
Bin Chen, Jie Xu
In -dimensional de Sitter spacetime, consistency of perturbative expansion requires imposing all second-order gravitational constraints associated with the isometry gr…
math.DG2025
Local regularity of spacetimes under Ricci curvature and Lie derivative conditions
Bing-Long Chen
In this paper, we derive a general regularity estimate for any 4-d spacetime, in terms of a priori bounds of the Ricci curvature and Lie derivative of the Lorentzian metric with re…
hep-th2025
Reflected entropy in an evaporating black hole through non-isometric map
Bin Chen, Zhi-jun Yin
The black hole information paradox has been an important problem in quantum gravity. In the study of evaporating black hole, it has been proposed that the holographic map between t…