2 citations · 2 across the 1 of their papers we have counts for
3 papers
gr-qc2021★ 2 cited
Infrared problem in the Faddeev-Popov-ghost propagator in perturbative quantum gravity in de Sitter spacetime
Jos Gibbons, Atsushi Higuchi, William C. C. Lima
The propagators for the Faddeev-Popov (FP) ghosts in Yang-Mills theory and perturbative gravity in the covariant gauge are infrared (IR) divergent in de Sitter spacetime. An IR cut…
gr-qc2020
Equivalence between the in-in perturbation theories for quantum fields in Minkowski spacetime and in the Rindler wedge
Atsushi Higuchi, William C. C. Lima
We investigate the relation between the time-ordered vacuum correlation functions for interacting real scalar fields in Minkowski spacetime and in the Rindler wedge. The correlatio…
gr-qc2016
Mode-sum construction of the covariant graviton two-point function in the Poincaré patch of de Sitter space
Markus B. Fröb, Atsushi Higuchi, William C. C. Lima
We construct the graviton two-point function for a two-parameter family of linear covariant gauges in n-dimensional de Sitter space. The construction is performed via the mode-sum…