Thermal interpretation of infrared dynamics in de Sitter

@article{Rigopoulos2016ThermalIO,
  title={Thermal interpretation of infrared dynamics in de Sitter},
  author={Gerasimos I Rigopoulos},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2016},
  volume={2016},
  pages={035 - 035}
}
  • G. Rigopoulos
  • Published 14 April 2016
  • Physics
  • Journal of Cosmology and Astroparticle Physics
The infrared dynamics of a light, minimally coupled scalar field in de Sitter spacetime with Ricci curvature R = 12H2, averaged over horizon sized regions of physical volume VH = (4π/3)(1/H)3, can be interpreted as Brownian motion in a medium with de Sitter temperature TDS = ℏH/2π. We demonstrate this by directly deriving the effective action of scalar field fluctuations with wavelengths larger than the de Sitter curvature radius and generalizing Starobinsky's seminal results on stochastic… 

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