# Inflationary dynamics of kinetically-coupled gauge fields

@article{Ferreira2014InflationaryDO, title={Inflationary dynamics of kinetically-coupled gauge fields}, author={Ricardo Z. Ferreira and Jonathan Ganc}, journal={Journal of Cosmology and Astroparticle Physics}, year={2014}, volume={2015}, pages={029 - 029} }

We investigate the inflationary dynamics of two kinetically-coupled massless U(1) gauge fields with time-varying kinetic-term coefficients. Ensuring that the system does not have strongly coupled regimes shrinks the parameter space. Also, we further restrict ourselves to systems that can be quantized using the standard creation, annihilation operator algebra. This second constraint limits us to scenarios where the system can be diagonalized into the sum of two decoupled, massless, vector fields…

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## References

SHOWING 1-10 OF 42 REFERENCES

Generation of large scale magnetic fields in single-field inflation

- Physics
- 2007

We consider the generation of large scale magnetic fields in slow-roll inflation. The inflaton field is described in a supergravity framework where the conformal invariance of the electromagnetic…

Inflationary magnetogenesis without the strong coupling problem

- Physics
- 2013

The simplest gauge invariant models of inflationary magnetogenesis are known to suffer from the problems of either large backreaction or strong coupling, which make it difficult to self-consistently…

Observable non-gaussianity from gauge field production in slow roll inflation, and a challenging connection with magnetogenesis

- Physics
- 2012

In any realistic particle physics model of inflation, the inflaton can be expected to couple to other fields. We consider a model with a dilaton-like coupling between a U(1) gauge field and a scalar…

Inflationary susceptibilities, duality, and large-scale magnetic field generation

- Physics
- 2013

We investigate what can be said about the interaction of scalar fields with Abelian gauge fields during a quasi-de Sitter phase of expansion and under the assumption that the electric and the…

Constraints on gauge field production during inflation

- Physics
- 2014

In order to gain new insights into the gauge field couplings in the early universe, we consider the constraints on gauge field production during inflation imposed by requiring that their effect on…

Instability of the Ackerman-Carroll-Wise model, and problems with massive vectors during inflation

- Physics
- 2009

We prove that the anisotropic inflationary background of the Ackerman-Carroll-Wise model, characterized by a fixed-norm vector field, is unstable. We found the instability by explicitly solving the…

Inflationary magnetogenesis without the strong coupling problem II: constraints from CMB anisotropies and B-modes

- Physics
- 2014

Recent observational claims of magnetic fields stronger than 10−16 G in the extragalactic medium motivate a new look for their origin in the inflationary magnetogenesis models. In this work we shall…

Signatures of anisotropic sources in the squeezed-limit bispectrum of the cosmic microwave background

- Physics
- 2013

The bispectrum of primordial curvature perturbations in the squeezed configuration, in which one wavenumber, k3, is much smaller than the other two, k3 > c0. A cosmic-variance-limited experiment…

Instability of anisotropic cosmological solutions supported by vector fields.

- PhysicsPhysical review letters
- 2009

It is shown that, quite generally, the concrete realizations proposed so far are plagued by instabilities (either ghosts or unstable growth of the linearized perturbations) which can be ultimately related to the longitudinal vector polarization present in them.