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gr-qc2019★ 12 cited
A massless scalar field in Robertson-Walker spacetimes: Adiabatic regularization and Green's function
Yang Zhang, Bo Wang, Xuan Ye
We study adiabatic regularization of a coupling massless scalar field in general spatially flat Robertson-Walker (RW) spacetimes. For the conformally-coupling, the 0th-order regula…
gr-qc2019★ 14 cited
Adiabatic regularization and Green's function of a scalar field in de Sitter space: Positive energy spectrum and no trace anomaly
Yang Zhang, Xuan Ye, Bo Wang
In the conventional adiabatic regularization the vacuum ultraviolet divergences of a quantum field in curved spacetime are removed by subtracting the -mode of the stress tensor…