 9852 Bros J., Epstein H., Moschella U.
 Analyticity properties and thermal effects for general quantum field
theory on de Sitter spacetime.
(128K, LATeX 2e)
Feb 9, 98

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Abstract. We propose a general framework for quantum field theory on the de Sitter
spacetime (i.e. for local field theories whose truncated
Wightman functions are not required to vanish).
By requiring that the fields satisfy a {\em weak spectral condition},
formulated in terms of the analytic continuation properties of their
Wightman functions, we show that a geodesical observer
will detect in the corresponding ``vacuum'' a blackbody radiation at
temperature $T={1}/{2\pi R}$.
We also prove the analogues of the PCT, ReehSchlieder and BisognanoWichmann
theorems.
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