A new vacuum state in de Sitter space

Details A new vacuum state in de Sitter space A new vacuum state in de Sitter space

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982phlb..117..283p&link_type=abstract

Physics Letters B, Volume 117, Issue 5, p. 283-286.

Physics

2

Scientific paper

We present a new vacuum state which can be defined in a region of de Sitter space. This region corresponds to a K=-1 Robertson-Walker coordinatization of de Sitter space. The renormalized expectation value of the stress tensor for the conformally invariant massless scalar field in this vacuum is evaluated, and is found to differ from the corresponding result in the usual de Sitter-invariant vacuum by the absence of a pure radiation term. We also indicate that this can be accounted for by regarding the de Sitter-invariant vacuum as a thermal state relative to the new vacuum.

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