Local temperature in curved spacetime

@article{Buchholz2006LocalTI,
  title={Local temperature in curved spacetime},
  author={Detlev Buchholz and Jan Schlemmer},
  journal={Classical and Quantum Gravity},
  year={2006},
  volume={24},
  pages={F25 - F31}
}
A physically meaningful local concept of temperature is introduced in quantum field theory on curved spacetime and applied to the example of a massless field on de Sitter space. It turns out in this model that the equilibrium (Gibbs) states which can be prepared by a geodesic observer have in general a varying temperature distribution in the neighbourhood of the geodesic and may not even allow for a consistent thermal interpretation close to the horizon. This result, which can be traced back to… 

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