Loop corrections to primordial fluctuations from inflationary phase transitions

@article{Wu2017LoopCT,
  title={Loop corrections to primordial fluctuations from inflationary phase transitions},
  author={Yi-Peng Wu and Jun’ichi Yokoyama},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2017},
  volume={2018},
  pages={009 - 009}
}
We investigate loop corrections to the primordial fluctuations in the single-field inflationary paradigm from spectator fields that experience a smooth transition of their vacuum expectation values. We show that when the phase transition involves a classical evolution effectively driven by a negative mass term from the potential, important corrections to the curvature perturbation can be generated by field perturbations that are frozen outside the horizon by the time of the phase transition… 

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References

SHOWING 1-10 OF 116 REFERENCES

One-loop graviton corrections to the curvature perturbation from inflation

We compute one-loop corrections to the power spectrum of the curvature perturbation in single-field slow-roll inflation arising from gravitons and inflaton interactions. The quantum corrections due

Loop corrections to cosmological perturbations in multi-field inflationary models

We investigate one-loop quantum corrections to the power spectrum of adiabatic perturbation from entropy modes/adiabatic mode cross-interactions in multiple DBI inflationary models. We find that due

One-loop corrections to the curvature perturbation from inflation

An estimate of the one-loop correction to the power spectrum of the primordial curvature perturbation is given, assuming it is generated during a phase of single-field, slow-roll inflation. The loop

IR Divergences in Inflation and Entropy Perturbations

We study leading order perturbative corrections to the two point correlation function of the scalar field describing the curvature perturbation in a slow-roll inflationary background, paying

Loops in inflationary correlation functions

We review the recent progress regarding the loop corrections to the correlation functions in the inflationary universe. A naive perturbation theory predicts that the loop corrections generated during

Super-Hubble de Sitter fluctuations and the dynamical RG

Perturbative corrections to correlation functions for interacting theories in de Sitter spacetime often grow secularly with time, due to the properties of fluctuations on super-Hubble scales. This

Semiclassical relations and IR effects in de Sitter and slow-roll space-times

We calculate IR divergent graviton one-loop corrections to scalar correlators in de Sitter space, and show that the leading IR contribution may be reproduced via simple semiclassical consistency

One-loop corrections to the power spectrum in general single-field inflation

We perform a thorough computation of the one-loop corrections from both scalar and tensor degrees of freedom to the power spectrum of curvature fluctuations for non-canonical Lagrangians in
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