Mathematics – Logic
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992anphy.219..201b&link_type=abstract
Ann. Phys. (N.Y.), Vol. 219, No. 2, p. 201 - 242
Mathematics
Logic
67
Scientific paper
The authors develop the one-loop calculational technique for the cosmological wave function in the no-boundary proposal of Hartle and Hawking. This proposal is reformulated as a path integral over true physical variables in the unitary quantum gravity theory analytically continued from the Lorentzian spacetime to the compact Euclidean one. Then the one-loop calculation of this integral and its covariant renormalization reduce to the construction of the generalized ζ-functions for differential operators on the ball-like Euclidean manifold. For ζ-functions of such operators with the explicitly unknown spectra the authors work out a special calculational algorithm based only on the knowledge of their basis functions and discuss in much detail their general properties in field theories as well as in quantum mechanical problems. This general technique is applied to the calculation of the one-loop graviton wave function of the de Sitter universe.
Barvinsky Andrei O.
Kamenshchik Alexander Yu.
Karmazin I. P.
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