Initial conditions for hybrid inflation

2000 ◽  
Vol 62 (10) ◽  
Author(s):  
Luís E. Mendes ◽  
Andrew R. Liddle
Keyword(s):  
Initial Conditions ◽  
Hybrid Inflation

scholarly journals Harmonic hybrid inflation

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Federico Carta ◽  
Nicole Righi ◽  
Yvette Welling ◽  
Alexander Westphal
Keyword(s):  
Domain Wall ◽  
Symmetry Breaking ◽  
Initial Conditions ◽  
Scalar Potential ◽  
Field Range ◽  
Slow Roll ◽  
Minimal Form ◽  
Wide Range ◽  
Hybrid Inflation ◽  
Type Iib String Theory

Abstract We present a mechanism for realizing hybrid inflation using two axion fields with a purely non-perturbatively generated scalar potential. The structure of the scalar potential is highly constrained by the discrete shift symmetries of the axions. We show that harmonic hybrid inflation generates observationally viable slow-roll inflation for a wide range of initial conditions. This is possible while accommodating certain UV arguments favoring constraints f ≲ MP and ∆ϕ60 ≲ MP on the axion periodicity and slow-roll field range, respectively. We discuss controlled ℤ2-symmetry breaking of the adjacent axion vacua as a means of avoiding cosmological domain wall problems. Including a minimal form of ℤ2-symmetry breaking into the minimally tuned setup leads to a prediction of primordial tensor modes with the tensor-to-scalar ratio in the range 10−4 ≲ r ≲ 0.01, directly accessible to upcoming CMB observations. Finally, we outline several avenues towards realizing harmonic hybrid inflation in type IIB string theory.

scholarly journals Initial conditions for smooth hybrid inflation

1996 ◽  
Vol 54 (2) ◽  
pp. 1369-1373 ◽  
Author(s):  
G. Lazarides ◽  
C. Panagiotakopoulos ◽  
N. D. Vlachos
Keyword(s):  
Initial Conditions ◽  
Hybrid Inflation

scholarly journals Fractal initial conditions and natural parameter values in hybrid inflation

2009 ◽  
Vol 80 (12) ◽  
Author(s):  
Sébastien Clesse ◽  
Christophe Ringeval ◽  
Jonathan Rocher
Keyword(s):  
Initial Conditions ◽  
Natural Parameter ◽  
Hybrid Inflation ◽  
Parameter Values

scholarly journals Anamorphosis in hybrid inflation: How to avoid fine-tuning of initial conditions?

2010 ◽  
Author(s):  
Sébastien Clesse ◽  
Jean-Michel Alimi ◽  
André Fuözfa
Keyword(s):  
Initial Conditions ◽  
Fine Tuning ◽  
Hybrid Inflation

INITIAL CONDITIONS FOR HYBRID INFLATION

2001 ◽  
pp. 45-50
Author(s):  
LUÍS E. MENDES ◽  
ANDREW R. LIDDLE
Keyword(s):  
Initial Conditions ◽  
Hybrid Inflation
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