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Mean-field quantum gravity

Physical Review D, 1992
We describe a new approach to quantum gravity, based on a kind of mean-field approximation. The action, which we choose to be quadratic in curvature and torsion, is made polynomial by replacing the inverse vierbein by its mean value. This action is used to compute the effective action for the vierbein and hence its vacuum expectation value.
FLOREANINI R, Percacci, Roberto
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