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Título: | R -summed form of adiabatic expansions in curved spacetime |
Autor: | Ferreiro, Antonio; Navarro-Salas, José CSIC ORCID; Pla, S. | Fecha de publicación: | may-2020 | Editor: | American Physical Society | Citación: | Physical Review D 101: 105011 (2020) | Resumen: | 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 Ricci scalar R can be summed exactly. We show that this (nonperturbative) property of the Schwinger-DeWitt series has a natural and equivalent counterpart in the adiabatic (Parker-Fulling) series expansion of the scalar modes in an homogeneous cosmological spacetime. The equivalence between both R-summed adiabatic expansions can be further extended when a background scalar field is also present. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevD.101.105011 | URI: | http://hdl.handle.net/10261/231253 | DOI: | 10.1103/PhysRevD.101.105011 | Identificadores: | doi: 10.1103/PhysRevD.101.105011 issn: 2470-0029 |
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