# Hill crossing during preheating after hilltop inflation

@article{Antusch2015HillCD, title={Hill crossing during preheating after hilltop inflation}, author={Stefan Antusch and David Nolde and Stefano Orani}, journal={Journal of Cosmology and Astroparticle Physics}, year={2015}, volume={2015}, pages={009 - 009} }

In ``hilltop inflation'', inflation takes place when the inflaton field slowly rolls from close to a maximum of its potential (i.e. the ``hilltop'') towards its minimum. When the inflaton potential is associated with a phase transition, possible topological defects produced during this phase transition, such as domain walls, are efficiently diluted during inflation. It is typically assumed that they also do not reform after inflation, i.e. that the inflaton field stays on its side of the ``hill…

## 24 Citations

### Parametric resonance after hilltop inflation caused by an inhomogeneous inflaton field

- Physics
- 2015

We study preheating after hilltop inflation where the inflaton couples to another scalar field, e.g. a right-handed sneutrino, which provides a mechanism for generating the correct initial conditions…

### The linear regime of tachyonic preheating

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2022

Tachyonic preheating is realized when the inflaton repeatedly returns to a convex region of the potential during the post-inflationary oscillating phase. This will induce a strong tachyonic…

### Oscillons from string moduli

- Physics
- 2017

A bstractA generic feature of string compactifications is the presence of many scalar fields, called moduli. Moduli are usually displaced from their post-inflationary minimum during inflation. Their…

### Impact of other scalar fields on oscillons after hilltop inflation

- Physics
- 2015

Oscillons are spatially localized and relatively stable field fluctuations which can form after inflation under suitable conditions. In order to reheat the universe, the fields which dominate the…

### A model with two periods of inflation

- Physics
- 2016

In this work a scenario with two subsequent periods of inflationary expansion in the very early Universe is examined. The model is based on a potential motivated by symmetries being found in field…

### Properties of oscillons in hilltop potentials: energies, shapes, and lifetimes

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

Oscillons are spatially localised strong fluctuations of a scalar field. They can e.g. form after inflation when the scalar field potential is shallower than quadratic away from the minimum. Although…

### What can we learn from the stochastic gravitational wave background produced by oscillons?

- Physics
- 2017

The stochastic gravitational wave (GW) background provides a fascinating window to the physics of the very early universe. Beyond the nearly scale-invariant primordial GW spectrum produced during…

### Non-thermal leptogenesis after Majoron hilltop inflation

- Physics
- 2018

We analyse non-thermal leptogenesis after models of Majoron hilltop inflation, where the scalar field that provides masses for the right-handed neutrinos and sneutrinos via its vacuum expectation…

### Supersymmetric small-field inflation with tribrid superpotentials

- Physics
- 2016

In this thesis, we study supersymmetric models of tribrid inflation and new inflation, both of which can be realized with a tribrid superpotential.
In the first part, we focus on tribrid…

## References

SHOWING 1-10 OF 47 REFERENCES

### Hilltop inflation with preinflation from coupling to matter fields

- Physics, Economics
- 2014

We propose a class of models of supersymmetric hilltop inflation (also called ``new inflation'') where the initial conditions of the inflaton close to the hilltop are generated through ``matter field…

### Preheating after small-field inflation

- Physics
- 2011

Whereas preheating after chaotic and hybrid inflation models has been abundantly studied in the literature, preheating in small field inflation models, where the curvature of the inflaton potential…

### Preheating in New Inflation

- Physics
- 2005

During the last ten years a detailed investigation of preheating was performed for chaotic inflation and for hybrid inflation. However, nonperturbative effects during reheating in the new inflation…

### Transition to order after hilltop inflation

- Physics
- 2014

We investigate the rich nonlinear dynamics during the end of hilltop inflation by numerically solving the coupled Klein-Gordon-Friedmann equations in a expanding universe. In particular, we search…

### Hilltop Inflation

- Economics
- 2005

We study ‘hilltop’ inflation, in which inflation takes place near a maximum of the potential. Viewed as a model of inflation after the observable Universe leaves the horizon (observable inflation),…

### Quantum mechanics of the scalar field in the new inflationary universe.

- PhysicsPhysical review. D, Particles and fields
- 1985

The theory of the upside-down harmonic oscillator as a toy model is discussed, with particular emphasis on the fact that the system can be described at late times by a classical probability distribution.

### Dynamical tuning of the initial condition for new inflation in supergravity

- Economics, Physics
- 1997

### Oscillons after inflation.

- PhysicsPhysical review letters
- 2012

It is shown that in a class of well-motivated single-field models, inflation is followed by self resonance, leading to copious oscillon generation and a lengthy period of oscillon domination, possibly leading to novel gravitational effects in the early Universe.

### Exploring two-field inflation in the Wess-Zumino model

- Economics
- 2014

We explore inflation via the effective potential of the minimal Wess-Zumino model, considering both the real and imaginary components of the complex field. Using transport techniques, we calculate…

### Semiclassicality and decoherence of cosmological perturbations

- Physics
- 1996

Transition to the semiclassical behaviour and the decoherence process for inhomogeneous perturbations generated from the vacuum state during an inflationary stage in the early Universe are considered…