7 papers
Quantum Big Bounce in Wheeler-DeWitt scattering theory: Ekpyrotic and LQC-like transitions
S. Lo Franco, G. Montani
We present a rigorous description of the quantum dynamics of the closed isotropic Universe in the presence of an ekpyrotic-like scalar field, expressed in terms of relativistic qua…
Big-Bounce in Quantum f(R)-Cosmology: Polymer Dynamics with Internal Time
M. L. Limongi, S. Lo Franco, G. Montani +1
We construct the Hamiltonian formulation of the isotropic Universe in a generic metric f(R)-theory in the Jordan frame. We canonically quantize the Universe volume via a polymer fo…
Running Einstein Constant and a Possible Vacuum State of the Universe
Giovanni Montani, Giulia Maniccia, Elisa Fazzari +1
We propose a revised formulation of General Relativity for cosmological settings, in which the Einstein constant varies with the energy density of the Universe. We demonstrate that…
Dynamics of the Mixmaster Universe in a non-commutative Generalized Uncertainty Principle framework
Sebastiano Segreto, Giovanni Montani
In this work, we examine the dynamical aspects of the cosmological Mixmaster model within the framework of non-commutative generalized uncertainty principle (GUP) theories. The the…
Is the BKL map an intrinsic feature of the Quantum Mixmaster Universe?
S. Lo Franco, G. Montani
We study the quantum Mixmaster dynamics by constructing the corresponding Wheeler-DeWitt equation as a relativistic quantum theory in a pseudo-Riemannian Mini-superspace. The trans…
Generalized Uncertainty Principle theories and their classical interpretation
Matteo Bruno, Sebastiano Segreto, Giovanni Montani
In this work, we show that it is possible to define a classical system associated with a Generalized Uncertainty Principle (GUP) theory via the implementation of a consistent sympl…