Big-bounce cosmology in the presence of Immirzi field

Flavio Bombacigno, Francesco Cianfrani, Giovanni Montani

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5 Citations (Scopus)


The Immirzi parameter is promoted to be a scalar field and the Hamiltonian analysis of the corresponding dynamical system is performed in the presence of gravity. We identified some SU(2) connections, generalizing Ashtekar-Barbero variables, and we rewrite the constraints in terms of them, setting the classical formulation suitable for loop quantization. Then, we consider the reduced system obtained when restricting to a flat isotropic cosmological model. By mimicking loop quantization via an effective semiclassical treatment, we outline how quantum effects are able to tame the initial singularity both in synchronous time and when the Immirzi field is taken as a relational time.
Original languageEnglish
Article number064021
Pages (from-to)-
JournalPhysical Review D
Issue number6
Publication statusPublished - 8 Sep 2016
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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