@article{Buchholz2007LocalTI,
title={Local temperature in curved spacetime},
author={D. Buchholz and J. Schlemmer},
journal={Classical and Quantum Gravity},
year={2007},
volume={24}
}

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… CONTINUE READING