Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Crisostomi, M."'
Autor:
Belgacem, E., Calcagni, G., Crisostomi, M., Dalang, C., Dirian, Y., Ezquiaga, J. M., Fasiello, M., Foffa, S., Ganz, A., Garcia-Bellido, J., Lombriser, L., Maggiore, M., Tamanini, N., Tasinato, G., Zumalacarregui, M., Barausse, E., Bartolo, N., Bertacca, D., Klein, A., Matarrese, S., Sakellariadou, M.
Publikováno v:
JCAP07(2019)024
Modifications of General Relativity leave their imprint both on the cosmic expansion history through a non-trivial dark energy equation of state, and on the evolution of cosmological perturbations in the scalar and in the tensor sectors. In particula
Externí odkaz:
http://arxiv.org/abs/1906.01593
Publikováno v:
Phys. Rev. D 90, 084003 (2014)
Cosmological perturbations of FRW solutions in ghost free massive bigravity, including also a second matter sector, are studied in detail. At early time, we find that sub horizon exponential instabilities are unavoidable and they lead to a premature
Externí odkaz:
http://arxiv.org/abs/1403.5679
We study in a systematic way a generic nonderivative (massive) deformation of general relativity using the Hamiltonian formalism. The number of propagating degrees of freedom is analyzed in a nonperturbative and background independent way. We show th
Externí odkaz:
http://arxiv.org/abs/1204.1027
Publikováno v:
JHEP 1203 (2012) 067
We study FRW homogeneous cosmological solutions in the recently found ghost free massive gravity. In previous works it was shown that when the additional extra metric, needed to generate the mass term, is taken as non-dynamical and flat, no homogeneo
Externí odkaz:
http://arxiv.org/abs/1111.1983
Recently, a class of theories of massive gravity has been shown to be ghost-free. We study the spherically symmetric solutions in the bigravity formulation of such theories. In general, the solutions admit both a Lorentz invariant and a Lorentz break
Externí odkaz:
http://arxiv.org/abs/1110.4967
In GR the static gravitational potential of a self-gravitating body goes as 1/r at large distances and any slower decrease leads to infinity energy. We show that in a class of four-dimensional massive gravity theories there exists spherically symmetr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c064ee1dc4181b068b70729c115bf7c5