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gr-qc2020
Instantaneous vacuum for Dirac fields with a Yukawa interaction in cosmological space-times
Antonio Ferreiro
We propose a suitable vacuum state for a quantized Dirac field interacting with a classical scalar field in a Friedman-Robertson-Walker-Lemaitre spacetime. This state is constructe…
gr-qc2020★ 9 cited
Running gravitational couplings, decoupling, and curved spacetime renormalization
Antonio Ferreiro, Jose Navarro-Salas
We propose to slightly generalize the DeWitt-Schwinger adiabatic renormalization subtractions in curved space to include an arbitrary renormalization mass scale . The new predic…
gr-qc2020★ 7 cited
R-summed form of adiabatic expansions in curved spacetime
Antonio Ferreiro, Jose Navarro-Salas, Silvia Pla
The Feynman propagator in curved spacetime admits an asymptotic (Schwinger-DeWitt) series expansion in derivatives of the metric. Remarkably, all terms in the series containing the…