GUT cosmic magnetic fields in a warm inflationary universe

Berera, Arjun; Kephart, Thomas W.; Wick, Stuart D.

doi:10.1103/physrevd.59.043510

Cited by 29 publications

(29 citation statements)

References 45 publications

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“…They also solved the full set of equations for linear fluctuations, including metric and entropy perturbations, in addition to the inflaton perturbations. Solving the Langevin equation gives 26) at the freezout scale, in agreement with the heuristic description above. However, a new effect can be seen when the friction coefficient depends on the temperature of the radiation.…”

Section: Fluctuationssupporting

confidence: 81%

Warm inflation and its microphysical basis

2009

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The microscopic quantum field theory origins of warm inflation dynamics are reviewed. The warm inflation scenario is first described along with its results, predictions and comparison with the standard cold inflation scenario. The basics of thermal field theory required in the study of warm inflation are discussed. Quantum field theory real time calculations at finite temperature are then presented and the derivation of dissipation and stochastic fluctuations are shown from a general perspective. Specific results are given of dissipation coefficients for a variety of quantum field theory interaction structures relevant to warm inflation, in a form that can readily be used by model builders. Different particle physics models realising warm inflation are presented along with their observational predictions.

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Section: Fluctuationssupporting

confidence: 81%

Warm inflation and its microphysical basis

2009

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“…2 also can serve to damp kinetic energy contributions before inflation, thus alleviating the initial condition problem of inflation [41]. Warm inflation is also a conducive regime for the creation of large scale cosmic magnetic fields based on the ferromagnetic Savvidy vacuum scenario [42]. Also, spontaneous baryogenesis has been shown to work efficiently in the last stages of warm inflation [43].…”

Section: Resultsmentioning

confidence: 99%

Warm inflation solution to the eta problem

Berera¹

2003

Proceedings of International Workshop on Astroparticle and High Energy Physics — PoS(AHEP2003)

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Warm inflationary dynamics is shown to satisfy both the slow-roll and density perturbation constraints for m φ H or equivalently η 1 and for inflaton field amplitudes much below the Planck scale, φ < m pl . I start by reviewing the two types of inflation dynamics, isentropic or cold inflation and nonisentropic or warm inflation.In the former, inflation occurs without radiation production, whereas in the latter both radiation production and inflation occur concurrently. I then discuss recent, detailed, quantum field theory calculations showing that many generic inflation models, including hybrid inflation, which were believed only to have cold inflation regimes, in fact have regimes of both warm and cold inflation. These results dispel many foregone assumptions generally made up to now about inflation models and bring to the fore various elementary issues that must be addressed to do reliable calculations from inflation models. I also discuss density perturbations and observational consequences of warm inflation, especially related to WMAP. Finally I show that warm inflation has intrinsic features that make the "eta problem" nonexistent, and field amplitudes are below the Planck scale.

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“…Since we are interested mainly in the analysis of the behavior of this system in the early universe, for which the actual ponderable matter should be identified with a primordial ionized plasma 17,18,19 , we are led to limit our considerations here to the case in which only the average of the squared magnetic field H 2 survives e . 12,17,18,20 This is formally equivalent to put E 2 = 0 in (8). Let us see what the consequences of this result are.…”

Section: Quantum Corrections Of Qed At the Radiation Eramentioning

confidence: 99%

On the Self-Consistence of Electrodynamics in the Early Universe

Lorenci¹,

Klippert²,

Novello³

et al. 2002

The Ninth Marcel Grossmann Meeting

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The issue of a self-consistent solution of Maxwell-Einstein equations achieves a very simple form when all quantum effects are neglected but a weak vacuum polarization due to an external magnetic field is taken into account. From a semi-classical point of view this means to deal with an appropriate limit of the one-loop effective Lagrangian for electrodynamics. When the corresponding stress-energy tensor is considered as a source of the gravitational field a surprisingly bouncing behavior is obtained. The present toy model leads to important new features which should have taken place in the early universe.

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GUT cosmic magnetic fields in a warm inflationary universe

Cited by 29 publications

References 45 publications

Warm inflation and its microphysical basis

Warm inflation and its microphysical basis

Warm inflation solution to the eta problem

On the Self-Consistence of Electrodynamics in the Early Universe

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