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Title: Helical phase inflation

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Publication Date:
Sponsoring Org.:
OSTI Identifier:
Grant/Contract Number:
10821504; 11075194; 11135003; 11275246; 11475238; 2010CB833000
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 91; Journal Issue: 6; Related Information: CHORUS Timestamp: 2015-04-13 14:01:41; Journal ID: ISSN 1550-7998
American Physical Society
Country of Publication:
United States

Citation Formats

Li, Tianjun, Li, Zhijin, and Nanopoulos, Dimitri V. Helical phase inflation. United States: N. p., 2015. Web. doi:10.1103/PhysRevD.91.061303.
Li, Tianjun, Li, Zhijin, & Nanopoulos, Dimitri V. Helical phase inflation. United States. doi:10.1103/PhysRevD.91.061303.
Li, Tianjun, Li, Zhijin, and Nanopoulos, Dimitri V. 2015. "Helical phase inflation". United States. doi:10.1103/PhysRevD.91.061303.
title = {Helical phase inflation},
author = {Li, Tianjun and Li, Zhijin and Nanopoulos, Dimitri V.},
abstractNote = {},
doi = {10.1103/PhysRevD.91.061303},
journal = {Physical Review D},
number = 6,
volume = 91,
place = {United States},
year = 2015,
month = 3

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.91.061303

Citation Metrics:
Cited by: 16works
Citation information provided by
Web of Science

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  • We smore » tudy helical phase inflation which realizes “monodromy inflation” in supergravity theory. In the model, inflation is driven by the phase component of a complex field whose potential possesses helicoid structure. We construct phase monodromy based on explicitly breaking global U ( 1 ) symmetry in the superpotential. By integrating out heavy fields, the phase monodromy from single complex scalar field is realized and the model fulfills natural inflation. The phase-axion alignment is achieved from explicitly symmetry breaking and gives super-Planckian phase decay constant. The F -term scalar potential provides strong field stabilization for all the scalars except inflaton, which is protected by the approximate global U ( 1 ) symmetry. Besides, we show that helical phase inflation can be naturally realized in no-scale supergravity with S U ( 2,1 ) / S U ( 2 ) × U ( 1 ) symmetry since the supergravity setup needed for phase monodromy is automatically provided in the no-scale Kähler potential. We also demonstrate that helical phase inflation can be reduced to another well-known supergravity inflation model with shift symmetry. Helical phase inflation is free from the UV-sensitivity problem although there is super-Planckian field excursion, and it suggests that inflation can be effectively studied based on supersymmetric field theory while a UV-completed framework is not prerequisite.« less
    Cited by 2
  • We study the generation of helical magnetic fields during single field inflation induced by an axial coupling of the electromagnetic field to the inflaton. During slow roll inflation, we find that such a coupling always leads to a blue spectrum with B{sup 2}(k)∝k, as long as the theory is treated perturbatively. The magnetic energy density at the end of inflation is found to be typically too small to backreact on the background dynamics of the inflaton. We also show that a short deviation from slow roll does not result in strong modifications to the shape of the spectrum. We calculatemore » the evolution of the correlation length and the field amplitude during the inverse cascade and viscous damping of the helical magnetic field in the radiation era after inflation. We conclude that except for low scale inflation with very strong coupling, the magnetic fields generated by such an axial coupling in single field slow roll inflation with perturbative coupling to the inflaton are too weak to provide the seeds for the observed fields in galaxies and clusters.« less