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Role of a "local" cosmological constant in Euclidean quantum gravity

Giovanni Modanese*

  • I.N.F.N. - Gruppo Collegato di Trento, Dipartimento di Fisica dell'Universitá, I-38050 Povo (TN), Italy

  • *Electronic address: modanese@science.unitn.it

Phys. Rev. D 54, 5002 – Published 15 October, 1996

DOI: https://doi.org/10.1103/PhysRevD.54.5002

Abstract

In 4D nonperturbative Regge calculus a positive value of the effective cosmological constant characterizes the collapsed phase of the system. If a local term of the form S=Σhε{h1,h2,}λhVh is added to the gravitational action, where {h1, h2, } is a subset of the hinges and {λh} are positive constants, one expects that the volumes Vh1, Vh2,  tend to collapse and that the excitations of the lattice propagating through the hinges {h1, h2, } are damped. We study the continuum analogue of this effect. The additional term S may represent the coupling of the gravitational field to an external Bose condensate.

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