Evolution of gravitons in accelerating cosmologies: The case of extended gravity

S. Capozziello, M. De Laurentis, S. Nojiri, and S. D. Odintsov

Phys. Rev. D 95, 083524 – Published 26 April 2017

Abstract

We discuss the production and evolution of cosmological gravitons showing how the cosmological background affects their dynamics. Besides, the detection of cosmological gravitons could constitute an extremely important signature to discriminate among different cosmological models. Here, we consider the cases of scalar-tensor gravity and $f (R)$ gravity where it is demonstrated the amplification of graviton amplitude changes if compared with General Relativity. Possible observational constraints are discussed.

Received 3 January 2017

DOI:https://doi.org/10.1103/PhysRevD.95.083524

Physics Subject Headings (PhySH)

Alternative gravity theories Gravitational waves Relativistic aspects of cosmology

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

S. Capozziello^1,2,3, M. De Laurentis^4,5,6,2, S. Nojiri^7,8, and S. D. Odintsov^5,9,10

¹Dipartimento di Fisica“E. Pancini”, Università di Napoli “Federico II,” Napoli, Italy
²INFN Sez. di Napoli, Compl. Univ. di Monte S. Angelo, Edificio G, Via Cinthia, I-80126 Napoli, Italy
³Gran Sasso Science Institute, Via F. Crispi 7, I-67100 L’ Aquila, Italy
⁴Institute for Theoretical Physics, Goethe University, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
⁵Tomsk State Pedagogical University, 634061 Tomsk, Russia
⁶Laboratory for Theoretical Cosmology, Tomsk State University of Control Systems and Radioelectronics (TUSUR), 634050 Tomsk, Russia
⁷Department of Physics, Nagoya University, Nagoya 464-8602, Japan
⁸Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya 464-8602, Japan
⁹ICREA, Passeig Luis Companys, 23, 08010 Barcelona, Spain
¹⁰Institute of Space Sciences (IEEC-CSIC) C. Can Magrans s/n, 08193 Barcelona, Spain

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Issue

Vol. 95, Iss. 8 — 15 April 2017

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Physical Review D

covering particles, fields, gravitation, and cosmology