Numerical study of pseudoscalar inflation with an axion-gauge field coupling

  title={Numerical study of pseudoscalar inflation with an axion-gauge field coupling},
  author={Shu-Lin Cheng and Wolung Lee and Kin-wang Ng},
  journal={Physical Review D},
A numerical study of a pseudoscalar inflation having an axion-photon-like coupling is performed by solving numerically the coupled differential equations of motion for inflaton and photon mode functions from the onset of inflation to the end of reheating. The backreaction due to particle production is also included self-consistently. We find that this particular inflation model realizes the idea of a warm inflation in which a steady thermal bath is established by the particle production. In… 

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  • Rev. D 87, 103506
  • 2013


  • Phys. 12
  • 2015


  • Phys. 05
  • 2015


  • Phys. 09 (2011) 033; M. Bastero-Gil, A. Berera, R. O. Ramos, and J. G. Rosa, J. Cosmol. Astropart. Phys. 01
  • 2013


  • Rev. D 81, 043534
  • 2010


  • Rev. D 85, 023525
  • 2012


  • Rev. D 84, 063527
  • 2011

For reviews see : K . A . Olive , Phys . Rep . 190 , 307 ( 1990 ) ; D . H . Lyth and A . Riotto