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2015

On Axionic Field Ranges, Loopholes and the Weak Gravity Conjecture

Brown, Jon, Cottrell, William, Shiu, Gary et al.

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In this short note we clarify some aspects of the impact that the Weak Gravity Conjecture has on models of (generalized) natural inflation.

We address in particular certain technical and conceptual concerns recently raised regarding the stringent constraints and conclusions found in our previous work (arXiv:1503.04783).
We also point out the difficulties faced by attempts to evade these constraints.
These new considerations improve the understanding of the quantum gravity constraints we found and further support the conclusion that it remains challenging for axions to drive natural inflation.

On Axionic Field Ranges, Loopholes and the Weak Gravity Conjecture · Around

Built on

K. Freese, J. A. Frieman, and A. V. Olinto, “Natural inflation with pseudo - Nambu-Goldstone bosons,” Phys.Rev.Lett
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J. E. Kim, H. P. Nilles, and M. Peloso, “Completing natural inflation,” JCAP
2005
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E. Bergshoeff, A. Collinucci, A. Ploegh, S. Vandoren, and T. Van Riet, “Non-extremal D-instantons and the AdS/CFT correspondence,” JHEP
2006
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N. Arkani-Hamed, L. Motl, A. Nicolis, and C. Vafa, “The String landscape, black holes and gravity as the weakest force,” JHEP
2007
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H. Ooguri and C. Vafa, “On the Geometry of the String Landscape and the Swampland,” Nucl.Phys
2007
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Similar

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L. McAllister, E. Silverstein, and A. Westphal, “Gravity Waves and Linear Inflation from Axion Monodromy,” Phys.Rev
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C. Long, L. McAllister, and P. McGuirk, “Aligned Natural Inflation in String Theory,” Phys.Rev
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Then

C. Cheung and G. N. Remmen, “Naturalness and the Weak Gravity Conjecture,” Phys.Rev.Lett
Original
2014
Later among the works it cites.
F. Marchesano, G. Shiu, and A. M. Uranga, “F-term Axion Monodromy Inflation,” JHEP
Original
2014
Later among the works it cites.
R. Blumenhagen and E. Plauschinn, “Towards Universal Axion Inflation and Reheating in String Theory,” Phys.Lett
Original
2014
Later among the works it cites.
A. Hebecker, S. C. Kraus, and L. T. Witkowski, “D7-Brane Chaotic Inflation,” Phys.Lett
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2014
Later among the works it cites.

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J. Brown, W. Cottrell, G. Shiu, and P. Soler, “Fencing in the Swampland: Quantum Gravity Constraints on Large Field Inflation,” 1503.04783

Cited in the paper.

M. Montero, A. M. Uranga, and I. Valenzuela, “Transplanckian axions !?,” 1503.03886

Cited in the paper.

T. Rudelius, “Constraints on Axion Inflation from the Weak Gravity Conjecture,” 1503.00795

Cited in the paper.

G. Shiu, W. Staessens, and F. Ye, “Widening the Axion Window via Kinetic and Stückelberg Mixings,” 1503.01015

Cited in the paper.

G. Shiu, W. Staessens, and F. Ye, “Large Field Inflation from Axion Mixing,” 1503.02965

Cited in the paper.

T. C. Bachlechner, C. Long, and L. McAllister, “Planckian Axions in String Theory,” 1412.1093

Original

Cited in the paper.

C. Vafa, “The String landscape and the swampland,” hep-th/0509212

Cited in the paper.