# Power-law modulation of the scalar power spectrum from a heavy field with a monomial potential

@article{Huang2018PowerlawMO,
title={Power-law modulation of the scalar power spectrum from a heavy field with a monomial potential},
author={Qing Guo Huang and Shi Pi},
journal={Journal of Cosmology and Astroparticle Physics},
year={2018},
volume={2018},
pages={001-001}
}
• Published 1 October 2016
• Physics
• Journal of Cosmology and Astroparticle Physics
The effects of heavy fields modulate the scalar power spectrum during inflation. We analytically calculate the modulations of the scalar power spectrum from a heavy field with a separable monomial potential, i.e. V(\phi)~\phi^n. In general the modulation is characterized by a power-law oscillation which is reduced to the logarithmic oscillation in the case of n=2.
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## References

SHOWING 1-10 OF 46 REFERENCES
Oscillatory features in the curvature power spectrum after a sudden turn of the inflationary trajectory
• Physics
• 2013
In the context of two-field inflation characterized by a light direction and a heavy direction, we revisit the question of the impact of the massive modes on the power spectrum produced after a turn
Towards general patterns of features in multi-field inflation
• Physics, Geology
• 2015
A bstractWe investigate the consequences of general curved trajectories in multi-field inflation. After setting up a completely general formalism using the mass basis, which naturally accommodates
Quasi-single field inflation with large mass
• Physics
• 2012
We study the effect of massive isocurvaton on density perturbations in quasi-single field inflation models, when the mass of the isocurvaton M becomes larger than the order of the Hubble parameter H.
Features of heavy physics in the CMB power spectrum
• Physics
• 2011
The computation of the primordial power spectrum in multi-field inflation models requires us to correctly account for all relevant interactions between adiabatic and non-adiabatic modes around and
Influence of heavy modes on perturbations in multiple field inflation
• Physics
• 2012
We investigate linear cosmological perturbations in multiple field inflationary models where some of the directions are light while others are heavy (with respect to the Hubble parameter). By
Effective field theory and decoupling in multifield inflation: An illustrative case study
• Physics
• 2011
We explore the effects of heavy degrees of freedom on the evolution and perturbations of light modes in multifield inflation. We use a simple two-field model as an example to illustrate the
Non-Gaussian features of primordial fluctuations in single field inflationary models
We compute the three point correlation functions for primordial scalar and tensor fluctuations in single field inflationary models. We obtain explicit expressions in the slow roll limit where the
Correlating features in the primordial spectra
• Physics
• 2013
Heavy fields coupled to the inflaton reduce the speed of sound in the effective theory of the adiabatic mode each time the background inflationary trajectory deviates from a geodesic. This can result
Curvature perturbation spectrum in two-field inflation with a turning trajectory
• Physics
• 2012
We revisit a two-component inflaton model with a turning trajectory in the field space, where the field slowly rolls down along the trajectory. We consider the case when the effective mass in the
Quantum contributions to cosmological correlations
The 'in-in' formalism is reviewed and extended, and applied to the calculation of higher-order Gaussian and non-Gaussian correlations in cosmology. Previous calculations of these correlations