Coupling the inflaton to an expanding aether

Donnelly, William J.; Jacobson, Ted

doi:10.1103/physrevd.82.064032

Cited by 57 publications

(80 citation statements)

References 35 publications

(69 reference statements)

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“…The study of several Lorentz-violating cosmological scenarios in the inflationary phase have been addressed in the literature [31][32][33][34][35][36][37][38]. Between such works we can highlight as motivations for our investigation, the approaches from Gasperini [31], and from Donnelly and Jacobson [38], for instance. In his work Gasperini proposes that the primordial phase of accelerated expansion of the Universe could be achieved if at some very early epoch the gravitational interactions were described by a non locally Lorentz invariant theory.…”

Section: Introductionmentioning

confidence: 99%

Cosmology in the Universe with Distance Dependent Lorentz-Violating Background

Almeida

Anacleto

Brito

et al. 2017

Advances in High Energy Physics

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Section: Introductionmentioning

confidence: 99%

Cosmology in the Universe with Distance Dependent Lorentz-Violating Background

Almeida

Anacleto

Brito

et al. 2017

Advances in High Energy Physics

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“…After presenting this initial argument, we will bring up similar, more refined attempts by Donnelly and Jacobson [20], and also Rosenblum, Pikovsky, and Kurths [21] via their phased synchronization of chaotic oscillators to suggest necessary refinements ss to the linkage of the chaotic Gaussian mapping with structure formation. The first part of the following discussion is meant to be motivational, with references from the other papers being refinements that will be worked on in additional publications.…”

Section: Linking Driving "Frequency" As a Results Of Change In Temperamentioning

confidence: 99%

“…Making use of Eq. (18) would be a way, to perhaps link between massive gravitons, as given by Beckwith [9] as well as Alves et al [24] and the implications of Donnelly and Jacobson's damped driven harmonic oscillator [20] as represented by Eq. (18) above, which would make our investigation more comprehensive.…”

Section: Linking Driving "Frequency" As a Results Of Change In Temperamentioning

confidence: 99%

See 1 more Smart Citation

How to use the cosmological Schwinger principle for energy flux, entropy, and "atoms of space–time" to create a thermodynamic space–time and multiverse

Beckwith¹

2011

J. Phys.: Conf. Ser.

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Abstract. We make explicit an idea by Padmanabhan in DICE 2010 [1], as to finding "atoms of space-time" permitting a thermodynamic treatment of emergent structure similar to Gibbs treatment of statistical physics. That is, an ensemble of gravitons is used to give an "atom" of space-time congruent with relic GW. The idea is to reduce the number of independent variables to get a simple emergent space-time structure of entropy. An electric field, based upon the cosmological Schwinger principle, is linked to relic heat flux, with entropy production tied in with candidates as to inflaton potentials. The effective electric field links with the Schwinger 1951s result of an E field leading to pairs of e + e − charges nucleated in space-time volume V · t. Note that in most inflationary models, the assumption is for a magnetic field, not an electric field. An electric field permits a kink-anti-kink construction of an emergent structure, which includes Glinka's recent pioneering approach to a Multiverse. Also an E field allows for an emergent relic particle frequency range between one and 100 GHz. The novel contribution is a relic E field, instead of a B field, in relic space-time "atom" formation and vacuum nucleation of the same.

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“…However, at shorter scales, the mixing between χ andξ disappears and the speeds of sound of these components become non negligible. 18 This leads to damped oscillations of these fields, clearly visible in the lower left panel of figure 3. The ratio of the power spectra in the enhanced gravity model and in ΛCDM is presented in figure 4.…”

Section: Jcap08(2013)039mentioning

confidence: 92%

Fabrication of Inert Silver Nanoparticles with a Thin Silica Coating

Nomura¹,

Fujii²,

Ohki³

et al. 2008

jjap

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The role of Lorentz invariance as a fundamental symmetry of nature has been lately reconsidered in different approaches to quantum gravity. It is thus natural to study whether other puzzles of physics may be solved within these proposals. This may be the case for the cosmological constant problem. Indeed, it has been shown that breaking Lorentz invariance provides Lagrangians that can drive the current acceleration of the universe without experiencing large corrections from ultraviolet physics. In this work, we focus on the simplest model of this type, called ΘCDM, and study its cosmological implications in detail. At the background level, this model cannot be distinguished from ΛCDM. The differences appear at the level of perturbations. We show that in ΘCDM, the spectrum of CMB anisotropies and matter fluctuations may be affected by a rescaling of the gravitational constant in the Poisson equation, by the presence of extra contributions to the anisotropic stress, and finally by the existence of extra clustering degrees of freedom. To explore these modifications accurately, we modify the Boltzmann code class. We then use the parameter inference code Monte Python to confront ΘCDM with data from WMAP-7, SPT and WiggleZ. We obtain strong bounds on the parameters accounting for deviations from ΛCDM. In particular, we find that the discrepancy between the gravitational constants appearing in the Poisson and Friedmann equations is constrained at the level of 1.8%.

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Coupling the inflaton to an expanding aether

Cited by 57 publications

References 35 publications

Cosmology in the Universe with Distance Dependent Lorentz-Violating Background

Cosmology in the Universe with Distance Dependent Lorentz-Violating Background

How to use the cosmological Schwinger principle for energy flux, entropy, and "atoms of space–time" to create a thermodynamic space–time and multiverse

Fabrication of Inert Silver Nanoparticles with a Thin Silica Coating

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