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A. A. Starobinsky, Cosmic Background Anisotropy Induced by Isotropic Flat-Spectrum Gravitational-Wave Perturbations
1985
Earlier work this paper cites.
T. Jacobson, Black hole evaporation and ultrashort distances
1991
Earlier work this paper cites.
A. R. Liddle and D. H. Lyth, COBE, gravitational waves, inflation and extended inflation
1992
Earlier work this paper cites.
C. Armendariz-Picon, T. Damour, and V. F. Mukhanov, k - inflation
1999
Earlier work this paper cites.
M. Alishahiha, E. Silverstein, and D. Tong, DBI in the sky
2004
Earlier work this paper cites.
N. Arkani-Hamed, P. Creminelli, S. Mukohyama, and M. Zaldarriaga, Ghost inflation
2004
Earlier work this paper cites.
S. E. Shandera and S. H. H. Tye, Observing brane inflation
2006
Earlier work this paper cites.
A. Adams, N. Arkani-Hamed, S. Dubovsky, A. Nicolis, and R. Rattazzi, Causality, analyticity and an IR obstruction to UV completion
2006
Earlier work this paper cites.
V. F. Mukhanov and A. Vikman, Enhancing the tensor-to-scalar ratio in simple inflation
2006
Earlier work this paper cites.

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A. Ashoorioon and G. Shiu, A Note on Calm Excited States of Inflation
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A. Ashoorioon, D. Chialva, and U. Danielsson, Effects of Nonlinear Dispersion Relations on Non-Gaussianities
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P. Creminelli, J. Gleyzes, J. Noreña, and F. Vernizzi, Resilience of the standard predictions for primordial tensor modes
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A. Ashoorioon, K. Dimopoulos, M. M. Sheikh-Jabbari, and G. Shiu, Reconciliation of High Energy Scale Models of Inflation with Planck
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2018

Extended Effective Field Theory of Inflation

Ashoorioon, Amjad, Casadio, Roberto, Cicoli, Michele et al.

Understand

We present a general framework where the effective field theory of single field inflation is extended by the inclusion of operators with mass dimension 3 and 4 in the unitary gauge.

These higher dimensional operators introduce quartic and sextic corrections to the dispersion relation.
We study the regime of validity of this extended effective field theory of inflation and the effect of these higher dimensional operators on CMB observables associated with scalar perturbations, such as the speed of sound, the amplitude of the power spectrum and the tensor-to-scalar ratio.
Tensor perturbations remain instead, unaltered.

Built on

A. A. Starobinsky, Cosmic Background Anisotropy Induced by Isotropic Flat-Spectrum Gravitational-Wave Perturbations
1985
Earlier work this paper cites.
T. Jacobson, Black hole evaporation and ultrashort distances
1991
Earlier work this paper cites.
A. R. Liddle and D. H. Lyth, COBE, gravitational waves, inflation and extended inflation
1992
Earlier work this paper cites.
C. Armendariz-Picon, T. Damour, and V. F. Mukhanov, k - inflation
1999
Earlier work this paper cites.
M. Alishahiha, E. Silverstein, and D. Tong, DBI in the sky
2004
Earlier work this paper cites.
N. Arkani-Hamed, P. Creminelli, S. Mukohyama, and M. Zaldarriaga, Ghost inflation
2004
Earlier work this paper cites.
S. E. Shandera and S. H. H. Tye, Observing brane inflation
2006
Earlier work this paper cites.
A. Adams, N. Arkani-Hamed, S. Dubovsky, A. Nicolis, and R. Rattazzi, Causality, analyticity and an IR obstruction to UV completion
2006
Earlier work this paper cites.
V. F. Mukhanov and A. Vikman, Enhancing the tensor-to-scalar ratio in simple inflation
2006
Earlier work this paper cites.