Vacuum energy and spectral function sum rules
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We reformulate the problem of the cancellation of the ultraviolet divergencies of the vacuum energy, particularly important at the cosmological level, in terms of a saturation of spectral function sum rules which leads to a set of conditions on the spectrum of the fundamental theory. We specialize the approach to both Minkowski and de Sitter space-times and investigate some examples.
11 pages, revtex4, no figures, version to be published on PRD
11 pages, revtex4, no figures, version to be published on PRD