Built on

A. D. Linde, “Chaotic Inflation,” Phys. Lett
1983
Earlier work this paper cites.
A. Manohar and H. Georgi, “Chiral Quarks and the Nonrelativistic Quark Model,” Nucl. Phys
1984
Earlier work this paper cites.
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Original
1989
Earlier work this paper cites.
K. Freese, J. A. Frieman, and A. V. Olinto, “Natural inflation with pseudo - Nambu-Goldstone bosons,” Phys. Rev. Lett
1990
Earlier work this paper cites.
T. Banks, M. Berkooz, S. H. Shenker, G. W. Moore, and P. J. Steinhardt, “Modular cosmology,” Phys. Rev
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Earlier work this paper cites.
C. Armendariz-Picon, T. Damour, and V. F. Mukhanov, “k-Inflation,” Phys. Lett
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Earlier work this paper cites.
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Similar

X. Chen, M.-x. Huang, S. Kachru, and G. Shiu, “Observational signatures and non-Gaussianities of general single field inflation,” JCAP
2007
Cited alongside, same era.
E. Silverstein and A. Westphal, “Monodromy in the CMB: Gravity Waves and String Inflation,” Phys. Rev
Original
2008
Cited alongside, same era.
C. Cheung, P. Creminelli, A. L. Fitzpatrick, J. Kaplan, and L. Senatore, “The Effective Field Theory of Inflation,” JHEP
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2009
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Then

G. D’Amico, R. Gobbetti, M. Schillo, and M. Kleban, “Inflation from Flux Cascades,” Phys. Lett
Original
2013
Later among the works it cites.
G. D’Amico, R. Gobbetti, M. Kleban, and M. Schillo, “Unwinding Inflation,” JCAP
Original
2013
Later among the works it cites.
N. Kaloper and A. Lawrence, “Natural chaotic inflation and ultraviolet sensitivity,” Phys. Rev
Original
2014
Later among the works it cites.
L. McAllister, E. Silverstein, A. Westphal, and T. Wrase, “The Powers of Monodromy,” JHEP
Original
2014
Later among the works it cites.
G. D’Amico and M. Kleban, “Non-Gaussianity after BICEP2,” Phys. Rev. Lett
Original

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2017

Monodromy inflation at strong coupling: $4\pi$ in the sky

D'Amico, Guido, Kaloper, Nemanja, Lawrence, Albion

Understand

We present a simple effective field theory formulation of a general family of single field flux monodromy models for which strong coupling effects at large field values can flatten the potential and activate operators with higher powers of derivatives.

These models are radiatively and non-perturbatively stable and can easily sustain $\ga 60$ efolds of inflation.
The dynamics combines features of both large field chaotic inflation and $k$-inflation, both of which can suppress the tensor amplitude.
Reducing the tensor-scalar ratio below the observational bound $r \lesssim 0.1$ while keeping the scalar spectral index $n_s$ within experimental bounds either yields equilateral nongaussianity $f_{NL}^{eq} \simeq {\cal O}(1)$, close to the current observational bounds, or ultimately gives very small $r$.

Built on

A. D. Linde, “Chaotic Inflation,” Phys. Lett
1983
Earlier work this paper cites.
A. Manohar and H. Georgi, “Chiral Quarks and the Nonrelativistic Quark Model,” Nucl. Phys
1984
Earlier work this paper cites.
N. Kaloper and L. Sorbo, “A Natural Framework for Chaotic Inflation,” Phys. Rev. Lett
Original
1989
Earlier work this paper cites.
K. Freese, J. A. Frieman, and A. V. Olinto, “Natural inflation with pseudo - Nambu-Goldstone bosons,” Phys. Rev. Lett
1990
Earlier work this paper cites.
T. Banks, M. Berkooz, S. H. Shenker, G. W. Moore, and P. J. Steinhardt, “Modular cosmology,” Phys. Rev
1995
Earlier work this paper cites.
C. Armendariz-Picon, T. Damour, and V. F. Mukhanov, “k-Inflation,” Phys. Lett
1999
Earlier work this paper cites.
J. Garriga and V. F. Mukhanov, “Perturbations in k-inflation,” Phys. Lett
1999
Earlier work this paper cites.
M. Alishahiha, E. Silverstein, and D. Tong, “DBI in the sky,” Phys. Rev
2004
Earlier work this paper cites.
A. Gruzinov, “Consistency relation for single scalar inflation,” Phys. Rev
2005
Earlier work this paper cites.