27 citations · 64 across the 6 of their papers we have counts for
5 papers · 1 filter
Inflation as a spontaneous symmetry breaking of Weyl symmetry
A. Barnaveli, S. Lucat, T. Prokopec
In this paper we study a novel realization of inflation, based on Weyl invariant gravity with torsion. We show that requiring the classical action for the scalar field to be Weyl i…
Conformal symmetry and the cosmological constant problem
Stefano Lucat, Tomislav Prokopec, Bogumila Swiezewska
We argue that, when a theory of gravity and matter is endowed with (classical) conformal symmetry, the fine tuning required to obtain the cosmological constant at its observed valu…
Is conformal symmetry really anomalous?
Stefano Lucat, Tomislav Prokopec
The conformal anomaly (also known as the stress-energy trace anomaly) of an interacting quantum theory, associated with violation of Weyl (conformal) symmetry by quantum effects, c…
Observing Geometrical Torsion
Stefano Lucat, Tomislav Prokopec
Dynamical (propagating) torsion can be observed by using conventional gravitational wave detectors such as LIGO, Virgo, LISA and bar detectors. We discuss specific signatures of di…
Cosmological singularities and bounce in Cartan-Einstein theory
Stefano Lucat, Tomislav Prokopec
We consider a generalized Einstein-Cartan theory, in which we add the unique covariant dimension four operators to general relativity that couples fermionic spin current to the tor…