122 citations · 565 across the 14 of their papers we have counts for
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Modifications in the Spectrum of Primordial Gravitational Waves Induced by Instantonic Fluctuations
Simone Mercuri
Vacuum to vacuum instantonic transitions modify the power spectrum of primordial gravitational waves. We evaluate the new form of the power spectrum for ordinary gravity as well as…
Introduction to Loop Quantum Gravity
Simone Mercuri
The questions I have been asked during the 5th International School on Field Theory and Gravitation, have compelled me to give an account of the premises that I consider important…
A solution of the strong CP problem via the Peccei-Quinn mechanism through the Nieh-Yan modified gravity and cosmological implications
Massimiliano Lattanzi, Simone Mercuri
By identifying the recently introduced Barbero-Immirzi field with the QCD axion, the strong CP problem can be solved through the Peccei-Quinn mechanism. A specific energy scale for…
A possible topological interpretation of the Barbero-Immirzi parameter
Simone Mercuri
A possible topological interpretation of the Barbero-Immirzi parameter is proposed. Classically, by generalizing the Holst action to torsional spacetimes, we construct a precise an…
Barbero-Immirzi field in canonical formalism of pure gravity
Gianluca Calcagni, Simone Mercuri
The Barbero-Immirzi (BI) parameter is promoted to a field and a canonical analysis is performed when it is coupled with a Nieh-Yan topological invariant. It is shown that, in the e…
Interaction of the Barbero--Immirzi Field with Matter and Pseudo-Scalar Perturbations
Simone Mercuri, Victor Taveras
In Loop Quantum Gravity the classical point of departure is the Einstein-Hilbert action modified by the addition of the so-called Holst term. Classically, this term does not affect…