# Preheating after modular inflation

@article{Barnaby2009PreheatingAM, title={Preheating after modular inflation}, author={Neil Barnaby and J. Richard Bond and Zhiqi Huang and Lev Kofman}, journal={Journal of Cosmology and Astroparticle Physics}, year={2009}, volume={2009}, pages={021-021} }

We study (p)reheating in modular (closed string) inflationary scenarios, with a special emphasis on Kahler moduli/Roulette models. It is usually assumed that reheating in such models occurs through perturbative decays. However, we find that there are very strong non-perturbative preheating decay channels related to the particular shape of the inflaton potential (which is highly nonlinear and has a very steep minimum). Preheating after modular inflation, proceeding through a combination of…

## 48 Citations

### Reheating the universe after multi-field inflation

- Physics
- 2010

We study in detail (p)reheating after multi-field inflation models with a particular focus on N-flation. We consider a variety of different couplings between the inflatons and the matter sector,…

### Reheating for closed string inflation

- Physics
- 2010

We point out some of the outstanding challenges for embedding inflationary cosmology within string theory studying the process of reheating for models where the inflaton is a closed string mode…

### Reheating for closed string inflation

- Physics
- 2010

We point out some of the outstanding challenges for embedding inflationary cosmology within string theory studying the process of reheating for models where the inflaton is a closed string mode…

### Poly-instanton inflation

- Economics
- 2011

We propose a new inflationary scenario in type IIB Calabi-Yau compactifications, where the inflaton is a Kahler modulus parameterising the volume of an internal four-cycle. The inflaton potential is…

### Reheating and dark radiation after fibre inflation

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

We study perturbative reheating at the end of fibre inflation where the inflaton is a closed string modulus with a Starobinsky-like potential. We first derive the spectral index ns and the…

### 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…

### Modulated reheating and large non-gaussianity in string cosmology

- Physics
- 2012

A generic feature of the known string inflationary models is that the same physics that makes the inflaton lighter than the Hubble scale during inflation often also makes other scalars this light.…

### Modulated Reheating and Large Non-Gaussianity in String Cosmology

- Physics
- 2012

A generic feature of the known string inflationary models is that the same physics that makes the inflaton lighter than the Hubble scale during inflation often also makes other scalars this light.…

### Moduli vacuum misalignment and precise predictions in string inflation

- Computer Science
- 2016

This paper compute exactly the shift of the number of e-foldings in Kähler moduli inflation which is determined by the magnitude of the moduli initial displacement caused by vacuum misalignment and themoduli decay rates.

### Chiral global embedding of fibre inflation models

- Mathematics
- 2017

A bstractWe construct explicit examples of fibre inflation models which are globally embedded in type IIB orientifolds with chiral matter on D7-branes and full closed string moduli stabilisation. The…

## References

SHOWING 1-10 OF 66 REFERENCES

### Stringy effects during inflation and reheating

- Physics
- 2006

We consider inflationary cosmology in the context of string compactifications with multiple throats. In scenarios where the warping differs significantly between throats, string and Kaluza-Klein…

### Towards the theory of reheating after inflation

- Physics
- 1997

Reheating after inflation occurs due to particle production by the oscillating inflaton field. In this paper we describe the perturbative approach to reheating, and then concentrate on effects beyond…

### Preheating After Inflation

- Economics
- 1998

In inflationary cosmology, the particles constituting the Universe are created after inflation in the process of reheating due to the interaction with the oscillating inflaton field. We briefly…

### DEFROST: a new code for simulating preheating after inflation

- Physics
- 2008

A new code for simulating scalar field dynamics in an expanding universe written for that purpose is presented, which significantly improves both the speed and the accuracy of calculations, and is fully instrumented for 3D visualization.

### Kahler moduli inflation

- Mathematics
- 2006

We show that under general conditions there is at least one natural inflationary direction for the Kahler moduli of type-IIB flux compactifications. This requires a Calabi-Yau which has…

### 'Black universe' epoch in string cosmology

- Physics
- 2008

String theory compactification involves manifolds with multiple warp factors. For cosmological applications, we often introduce a short, high-energy inflationary throat, and a long, low-energy…

### Inflating in a Better Racetrack

- MathematicsJournal of High Energy Physics
- 2006

We present a new version of our racetrack inflation scenario which, unlike our original proposal, is based on an explicit compactification of type IIB string theory: the Calabi-Yau manifold…

### Theory of fermionic preheating

- Physics
- 2000

In inflationary cosmology, the particles constituting the Universe are created after inflation due to their interaction with moving inflaton field(s) in the process of preheating. In the fermionic…

### Kahler moduli inflation revisited

- Mathematics
- 2010

We perform a detailed numerical analysis of inflationary solutions in Kahler moduli of type IIB flux compactifications. We show that there are inflationary solutions even when all the fields play an…

### LARGE volume string compactifications at finite temperature

- Physics
- 2009

We present a detailed study of the finite-temperature behaviour of the LARGE Volume type IIB flux compactifications. We show that certain moduli can thermalise at high temperatures. Despite that,…