scholarly journals Primordial magnetic fields in thef2FFmodel in large field inflation under de Sitter and power law expansion

2016 ◽  
Vol 337 (3) ◽  
pp. 318-328
Author(s):  
A. S. Al Muhammad ◽  
R. Lopez-Mobiia
Keyword(s):  
Magnetic Fields ◽  
Power Law ◽  
Large Field ◽  
De Sitter ◽  
Primordial Magnetic Fields

scholarly journals HELICAL MAGNETIC FIELDS FROM INFLATION

2009 ◽  
Vol 18 (09) ◽  
pp. 1395-1411 ◽  
Author(s):  
LEONARDO CAMPANELLI
Keyword(s):  
Magnetic Fields ◽  
Power Law ◽  
Background Field ◽  
Wave Number ◽  
Conformal Time ◽  
De Sitter ◽  
Simple Power ◽  
Dimensionless Constant ◽  
Real Positive Number

We analyze the generation of seed magnetic fields during de Sitter inflation considering a noninvariant conformal term in the electromagnetic Lagrangian of the form [Formula: see text], where I(ϕ) is a pseudoscalar function of a nontrivial background field ϕ. In particular, we consider a toy model that could be realized owing to the coupling between the photon and either a (tachyonic) massive pseudoscalar field or a massless pseudoscalar field nonminimally coupled to gravity, where I follows a simple power law behavior I(k,η) = g/(-kη)β during inflation, while it is negligibly small subsequently. Here, g is a positive dimensionless constant, k the wave number, η the conformal time, and β a real positive number. We find that only when β = 1 and 0.1 ≲ g ≲ 2 can astrophysically interesting fields be produced as excitation of the vacuum, and that they are maximally helical.

scholarly journals Origin of primordial magnetic fields

2008 ◽  
Vol 77 (4) ◽  
Author(s):  
Rafael S. de Souza ◽  
Reuven Opher
Keyword(s):  
Magnetic Fields ◽  
Primordial Magnetic Fields

scholarly journals Inflation from charged scalar and primordial magnetic fields?

2010 ◽  
Vol 81 (8) ◽  
Author(s):  
Razieh Emami ◽  
Hassan Firouzjahi ◽  
M. Sadegh Movahed
Keyword(s):  
Magnetic Fields ◽  
Charged Scalar ◽  
Primordial Magnetic Fields

scholarly journals Primordial magnetic fields from dark energy

2002 ◽  
Vol 542 (1-2) ◽  
pp. 1-7 ◽  
Author(s):  
Da-Shin Lee ◽  
Wolung Lee ◽  
Kin-Wang Ng
Keyword(s):  
Dark Energy ◽  
Magnetic Fields ◽  
Primordial Magnetic Fields
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