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Induced gravity, and minimally and conformally coupled scalar fields in Bianchi-I cosmological models
A. Yu. Kamenshchik, E. O. Pozdeeva, A. A. Starobinsky +3
We study the cosmological evolution and singularity crossing in the Bianchi-I universe filled with a conformally coupled scalar field and compare them with those of the Bianchi-I u…
The Born-Oppenheimer Method, Quantum Gravity and Matter
Alexander Yu Kamenshchik, Alessandro Tronconi, Giovanni Venturi
We illustrate and examine diverse approaches to the quantum matter-gravity system which refer to the Born-Oppenheimer (BO) method. In particular we first examine a quantum geometro…
Graviton propagator, renormalization scale and black-hole like states
X. Calmet, R. Casadio, A. Yu. Kamenshchik +1
We study the analytic structure of the resummed graviton propagator, inspired by the possible existence of black hole precursors in its spectrum. We find an infinite number of pole…
Bianchi-I cosmological model and crossing singularities
Alexander Yu. Kamenshchik, Ekaterina O. Pozdeeva, Sergey Yu. Vernov +2
We consider a rather simple method for the description of the Big Bang - Big Crunch cosmological singularity crossing. For the flat Friedmann universe this method gives the same re…