Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1992-04-15
Class.Quant.Grav.9:1883-1890,1992
Physics
High Energy Physics
High Energy Physics - Theory
14 pages, no figures, phyzzx macro
Scientific paper
10.1088/0264-9381/9/8/010
We suggest a model of induced gravity in which the fundamental object is a relativistic {\it membrane} minimally coupled to a background metric and to an external three index gauge potential. We compute the low energy limit of the two-loop effective action as a power expansion in the surface tension. A generalized bootstrap hypothesis is made in order to identify the physical metric and gauge field with the lowest order terms in the expansion of the vacuum average of the composite operators conjugate to the background fields. We find that the large distance behaviour of these classical fields is described by the Einstein action with a cosmological term plus a Maxwell type action for the gauge potential. The Maxwell term enables us to apply the Hawking-Baum argument to show that the physical cosmological constant is ``~probably~'' zero.
Aurilia Antonio
Smailagic Anais
Spallucci Euro
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