Scripto sopra Theseu Re

Maggiore, Marco

doi:10.1515/9783110436471

Cited by 6 publications

(3 citation statements)

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“…In Ref. [39] it has been argued that the existence of ghosts in non-local theories does not necessarily rule out the model since the ghost mode is actually "frozen" due to fixed boundary conditions imposed on the model. Interestingly, the predicted value σ 8 = 0.78 for Ω 0 M = 0.3 is in agreement to within 1σ with the recent estimates (σ 8 = 0.745 +0.038 −0.038 ) based on lensing, see e.g.…”

Section: Discussionmentioning

confidence: 99%

Structure formation in the Deser-Woodard nonlocal gravity model: a reappraisal

Nersisyan

Cid

Amendola

2017

J. Cosmol. Astropart. Phys.

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In this work, we extend previous analyses of the structure formation in the f ( −1 R) model of nonlocal gravity proposed by Deser and Woodard (DW), which reproduces the background expansion of ΛCDM with no need of a cosmological constant nor of any dimensional constant beside Newton's one. A previous analysis based on redshift-space distortions (RSD) data concluded that the model was ruled out. In this work we revisit the issue and find that, when recast in a localized model, the DW model is not ruled out and actually gives a better fit to RSD data than ΛCDM. At the same time, the model predicts a slightly lower value of σ8 than ΛCDM, in agreement with recent estimates based on lensing. We also produce analytical approximations of the two modified gravity functions and of f σ8(z) as a function of redshift. Finally, we also show how much the fit depends on initial conditions when these are generalized with respect to a standard matter-dominated era.

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Section: Discussionmentioning

confidence: 99%

Structure formation in the Deser-Woodard nonlocal gravity model: a reappraisal

Nersisyan

Cid

Amendola

2017

J. Cosmol. Astropart. Phys.

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“…Nonlocal cosmological models have been the topic of intense work in the last few years [26,[31][32][33][34][35]. They can be seen as an attempt at capturing quantum corrections to the Einstein-Hilbert Lagrangian and to provide, at the same time, an accelerated cosmology even in the limit of vanishing cosmological constant.…”

Section: Discussionmentioning

confidence: 99%

“…1-4, the numerical evolution of the auxiliary fields as well as the behavior of w eff and Ω M,R,DE are very similar to those of the RR nonlocal model presented in Refs. [23,26]. In order to understand why two, at first glance, completely different models exhibit almost the same cosmological evolution let us first compare them at the level of the actions.…”

Section: The Modelmentioning

confidence: 99%

Quantum gravity inspired nonlocal gravity model

2017

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We consider a nonlocal gravity model motivated by nonperturbative quantum gravity studies. This model, if correct, suggests the existence of strong IR relevant effects which can lead to an interesting late time cosmology. We implement the IR modification directly in the effective action. We show that, upon some assumptions on initial conditions, this model describes an observationally viable background cosmology being also consistent with local gravity tests.

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Theresentences in extreme southern Italy

Angelis

Bucci

2022

JHL

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Among the morpho-syntactic patterns by which Italo-Romance varieties code there sentences, a peculiar structure surfaces in extreme southern varieties, particularly in Salento and in southern Calabria: this involves an invariable 3rd person form of the outcome of habēre as the copula, with no agreement with the postcopular nominal, the so-called pivot. Even though this pattern is attested in other Romance languages too, it proves, however, to be peculiar, insofar as it hosts top-ranking definite NPs (especially 1st and 2nd person pronouns), which are generally disallowed within ‘to have’ there sentences in the Romance varieties. In the present paper, we infer that this pattern depends on the contact with Italo-Greek, which displays similar constructions, with an invariant 3rd sg. form of ‘to have’, the lack of the proform and the pivot marked as accusative. However, a diachronic investigation reveals that neither the extreme southern Italo-Romance varieties nor Italo-Greek displayed in their Medieval stage a similar construction, since both of them exhibited the definiteness effect. Sociolinguistic factors can account for how the two systems influenced each other by ruling out the definiteness effect from the respective patterns at the end of the interference process.

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Scripto sopra Theseu Re

Cited by 6 publications

References 0 publications

Structure formation in the Deser-Woodard nonlocal gravity model: a reappraisal

Structure formation in the Deser-Woodard nonlocal gravity model: a reappraisal

Quantum gravity inspired nonlocal gravity model

Theresentences in extreme southern Italy

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