Domain walls, wormholes and the cosmological constant

Details Domain walls, wormholes and the cosmological constant Domain walls, wormholes and the cosmological constant

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phlb..241..481m&link_type=abstract

Physics Letters B, Volume 241, Issue 4, p. 481-486.

Physics

Scientific paper

We examine the Hawking-Baum-Coleman mechanism in the context of a universe containing a domain wall. We find new instantons with a negative cosmological constant in our model, but the above mechanism still selects zero cosmological constant. Unstable domain walls can produce a complex result, making unclear the interpretation of the euclidean gravitational path integral as a probability distribution.
I would like to thank C. Burgess for useful conversations.

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