Dynamics of gauge field inflation

Journal Article · Fri May 01 00:00:00 EDT 2015 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2015/05/005· OSTI ID:22525860

Alexander, Stephon; Jyoti, Dhrubo ^[1]; Kosowsky, Arthur ^[2]; Marcianò, Antonino ^[3]

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1. Center for Cosmic Origins and Department of Physics and Astronomy, 6127 Wilder Laboratory, Dartmouth College, Hanover, NH 03755 (United States)
2. Department of Physics and Astronomy, University of Pittsburgh, 3941 O'Hara Street, Pittsburgh, PA 15260 (United States)
3. Center for Field Theory and Particle Physics and Department of Physics, Fudan University, 220 Handan Road, Shanghai (China)

We analyze the existence and stability of dynamical attractor solutions for cosmological inflation driven by the coupling between fermions and a gauge field. Assuming a spatially homogeneous and isotropic gauge field and fermion current, the interacting fermion equation of motion reduces to that of a free fermion up to a phase shift. Consistency of the model is ensured via the Stückelberg mechanism. We prove the existence of exactly one stable solution, and demonstrate the stability numerically. Inflation arises without fine tuning, and does not require postulating any effective potential or non-standard coupling.

• OSTI ID: 22525860
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 05; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ATTRACTORS
COSMOLOGICAL INFLATION
COSMOLOGY
COUPLING
EQUATIONS OF MOTION
FERMIONS
GAUGE INVARIANCE
INFLATIONARY UNIVERSE
MATHEMATICAL SOLUTIONS
PHASE SHIFT
POTENTIALS
STABILITY
TUNING