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- Institute of Space SciencesES47 papers
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28 papers · 1 filter
Classifying and avoiding singularities in the alternative gravity dark energy models
S. Capozziello, M. De Laurentis, S. Nojiri +1
The future finite-time singularities emerging in alternative gravity dark energy models are classified and studied in Jordan and Einstein frames. It is shown that such singularity…
On Schwinger Pair Creation in Gravity and in Closed Superstring Theory
Jorge G. Russo
We investigate the Schwinger pair creation process in the context of gravitational models with the back reaction of the electric field included in the geometry. The background is a…
Black Holes as Lumps of Fluid
Marco M. Caldarelli, Oscar J. C. Dias, Roberto Emparan +1
The old suggestive observation that black holes often resemble lumps of fluid has recently been taken beyond the level of an analogy to a precise duality. We investigate aspects of…
Modified gravity as realistic candidate for dark energy, inflation and dark matter
Shin'ichi Nojiri, Sergei D. Odintsov
We review the unification of early-time inflation with late-time acceleration in several local modified gravity models which pass Solar System and cosmological tests. It is also de…
Accelerating cosmologies from non-local higher-derivative gravity
Salvatore Capozziello, Emilio Elizalde, Shin'ichi Nojiri +1
We study accelerating cosmological solutions of a general class of non-linear gravities which depend on Gauss-Bonnet and other higher derivative invariants. To achieve this goal a…
gravity constrained by PPN parameters and stochastic background of gravitational waves
S. Capozziello, M. De Laurentis, S. Nojiri +1
We analyze seven different viable -gravities towards the Solar System tests and stochastic gravitational waves background. The aim is to achieve experimental bounds for the t…