# Gravitational wave consistency relations for multifield inflation.

@article{Price2015GravitationalWC, title={Gravitational wave consistency relations for multifield inflation.}, author={Layne Price and Hiranya V. Peiris and Jonathan Frazer and Richard Easther}, journal={Physical review letters}, year={2015}, volume={114 3}, pages={ 031301 } }

We study the tensor spectral index n(t) and the tensor-to-scalar ratio r in the simplest multifield extension to single-field, slow-roll inflation models. We show that multifield models with potentials V∼[under ∑]iλ_{i}|ϕ_{i}|^{p} have different predictions for n(t)/r than single-field models, even when all the couplings are equal λ_{i}=λ_{j}, due to the probabilistic nature of the fields' initial values. We analyze well-motivated prior probabilities for the λ_{i} and initial conditions to make…

## 30 Citations

### Calculation of the Curvature Perturbation During Non-Canonical Multifield Inflation

- Physics
- 2019

In this thesis we study models of inflation with a curved field-space metric. We concern ourselves with the calculation of the statistics of curvature perturbations which is essential for connecting…

### Non-Gaussianities and tensor-to-scalar ratio in non-local R2-like inflation

- Physics
- 2020

In this paper we will study $R^2$-like inflation in a non-local modification of gravity which contains quadratic in Ricci scalar and Weyl tensor terms with analytic infinite derivative form-factors…

### Gravitational waves from inflation

- Physics
- 2016

The production of a stochastic background of gravitational waves is a fundamental prediction of any cosmological inflationary model. The features of such a signal encode unique information about the…

### Power spectrum oscillations from Planck-suppressed operators in effective field theory motivated monodromy inflation

- Physics
- 2015

We consider a phenomenological model of inflation where the inflaton is the phase of a complex scalar field $\Phi$. Planck-suppressed operators of $\mathcal O(f^5/M_\mathrm{pl})$ modify the geometry…

### Many-field inflation: universality or prior dependence?

- MathematicsJournal of Cosmology and Astroparticle Physics
- 2020

We investigate the observational signatures of many-field inflation and present analytic expressions for the spectral index as a function of the prior. For a given prior we employ the central limit…

### Inflation in non-minimal matter-curvature coupling theories

- Physics
- 2017

We study inflationary scenarios driven by a scalar field in the presence of a non-minimal coupling between matter and curvature. We show that the Friedmann equation can be significantly modified when…

### Large scale power suppression in a multifield landscape

- Physics
- 2015

Power suppression of the cosmic microwave background on the largest observable scales could provide valuable clues about the particle physics underlying inflation. Here we consider the prospect of…

### Inflation in a conformally invariant two-scalar-field theory with an extra $$R^2$$R2 term

- Physics, Mathematics
- 2015

We explore inflationary cosmology in a theory where there are two scalar fields which non-minimally couple to the Ricci scalar and an additional $$R^2$$R2 term, which breaks the conformal invariance.…

### MULTIMODECODE: an efficient numerical solver for multifield inflation

- Computer Science
- 2014

We present MULTIMODECODE, a Fortran 95/2000 package for the numerical exploration of multifield inflation models. This program facilitates efficient Monte Carlo sampling of prior probabilities for…

### Slow-roll approximation in quantum cosmology

- Physics
- 2020

In minimally coupled scalar field theories with a potential of the slow-roll type, we give a detailed description of the complex O(4)-symmetric solutions to Einstein’s equations on the four-ball…

## References

SHOWING 1-10 OF 72 REFERENCES

### Society of Photo-Optical Instrumentation Engineers

- Physics
- 2005

We report here the preliminary results obtained with the multi-conjugate adaptive optics (MCAO) system at the Dunn Solar Telescope (DST/NSO MCAO) and the optical setup and performances are presented…

### BICEP2 Collaboration), Phys.Rev.Lett

- 2014

### Astropart

- Phys. 05
- 2006

### Astropart

- Phys. 01
- 2006

### Phys

- Rev. D 73, 123503
- 2006

### Astropart

- Phys. 10
- 2013

### and L

- C. Price, Phys.Rev.Lett. 112, 161302
- 2014

### JCAP 1307

- 002
- 2013

### arXiv:1306.2259 [astro-ph.CO

- (PRISM Collaboration),
- 2013