We show that an n-dimensional generalized Robertson-Walker (GRW) space-time with divergence-free conformal curvature tensor exhibits a perfect fluid stress-energy tensor for any f(R) gravity model. Furthermore, we prove that a conformally flat GRW space-time is still a perfect fluid in both f(R) and quadratic gravity where other curvature invariants are considered.
Cosmological perfect-fluids in f (R) gravity / S. Capozziello, C.A. Mantica, L.G. Molinari. - In: INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS. - ISSN 0219-8878. - 16:1(2019 Jan), pp. 1950008.1-1950008.14. [10.1142/S0219887819500087]
Cosmological perfect-fluids in f (R) gravity
C.A. Mantica;L.G. Molinari
Ultimo
2019
Abstract
We show that an n-dimensional generalized Robertson-Walker (GRW) space-time with divergence-free conformal curvature tensor exhibits a perfect fluid stress-energy tensor for any f(R) gravity model. Furthermore, we prove that a conformally flat GRW space-time is still a perfect fluid in both f(R) and quadratic gravity where other curvature invariants are considered.
| File | Dimensione | Formato | |
|---|---|---|---|
|
15) f(R).pdf
accesso aperto
Tipologia:
Pre-print (manoscritto inviato all'editore)
Dimensione
200.14 kB
Formato
Adobe PDF
|
200.14 kB | Adobe PDF | Visualizza/Apri |
|
s0219887819500087.pdf
accesso riservato
Tipologia:
Publisher's version/PDF
Dimensione
197.44 kB
Formato
Adobe PDF
|
197.44 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
