575 citations · 1.8k across the 24 of their papers we have counts for
27 papers
Gravitationally Induced UV Completion of an Scalar Theory
Alfio M. Bonanno, Emiliano M. Glaviano
We investigate the ultraviolet completion of an scalar field theory non-minimally coupled to gravity using the Wilsonian functional renormalization group in the proper-time…
RG studies of scalar-field models of long-range interactions
Alfio M. Bonanno, S. R. Haridev, Gaurav Narain
In this work we studies the long-range interactions in non-gravitational field theories and their behaviour in the deep infrared. To model such effects, we consider a nonlocal scal…
Veiled Singularities in Einstein-Weyl Gravity: Stability and Physical Interpretation of Horizonless Solutions
Alfio M. Bonanno, Samuele Silveravalle, Andrea Spina
We investigate a class of horizonless solutions in Einstein-Weyl gravity, corresponding to the so-called attractive naked singularities of the (-2,2) type. In contrast to General R…
Regular Black Holes from Proper-Time flow in Quantum Gravity and their Quasinormal modes, Shadow and Hawking radiation
Alfio Bonanno, Roman A. Konoplya, Giovanni Oglialoro +1
We derive a class of regular black holes from the proper-time renormalization group approach to asymptotically safe gravity. A central challenge is the robustness of physical predi…
Proper-time functional renormalization in scalar models coupled to gravity
Alfio M. Bonanno, Emiliano M. Glaviano, Gian Paolo Vacca
We focus on the use of the functional Wilsonian renormalization group framework characterized by a proper time regulator and test its use in the search of the scaling solutions and…
Cauchy Horizon (In)Stability of Regular Black Holes
Alfio Bonanno, Antonio Panassiti, Frank Saueressig
A common feature of regular black hole spacetimes is the presence of an inner Cauchy horizon. The analogy to the Reissner-Nordström solution then suggests that these geometries suf…
Spontaneous ghostification: how a dying black hole comes back as a naked singularity
Alfio Bonanno, Samuele Silveravalle
A quantum ghost that destabilizes the Schwarzschild solution, transforming it into a naked singularity, may seem like a physicist's worst nightmare. However, we argue that this sce…
Ghost-induced phase transition in the final stages of black hole evaporation
Alfio Bonanno, Samuele Silveravalle
We explore a novel scenario in which a quantum-induced ghost instability drives the natural evolution of an evaporating Schwarzschild black hole toward a stable naked singularity.…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
Path integral measures and diffeomorphism invariance
Alfio Bonanno, Kevin Falls, Renata Ferrero
Much like the action, diffeomorphism invariance can be used to fix the form of the path integral measure in quantum gravity. Moreover, since there is a redundancy between what cons…
Searching for quantum-gravity footprint around stellar-mass black holes
Luigi Foschini, Alberto Vecchiato, Alfio Bonanno
According to the asymptotically safe gravity, black holes may have characteristics different from those described according to general relativity if the running of the gravitationa…
Scalar Perturbations of Regular Black Holes derived from a Non-Singular Collapse Model in Asymptotic Safety
Andrea Spina, Samuele Silveravalle, Alfio Bonanno
We investigate the massless scalar field perturbations, focusing on the quasinormal modes spectrum and the ringdown waveform of regular black hole spacetimes derived within the Asy…
Effective Quantum Spacetimes from Functional Renormalization Group
Alfio Bonanno, Mariano Cadoni, Mirko Pitzalis +1
Using the Functional Renormalization Group approach we construct effective quantum spacetime geometries by self-consistently deforming the classical Schwarzschild-de Sitter black-h…
Black holes at a crossroads: late-stage evaporation in quadratic gravity
Alfio Bonanno, Samuele Silveravalle
In General Relativity black hole evaporation leads to sudden bursts of energy and loss of information. It can be argued that these phenomena happen in the final stages of evaporati…
Renormalization Group-Improved Gravitational Action: A Lagrangian Framework
Alfio Bonanno, Konstantinos F. Dialektopoulos, Vasilios Zarikas
A new approach for embedding the renormalization group running of Newton's constant and cosmological constant in gravity is proposed. This approach is based on a gravitational Lagr…
An emergent cosmological model from running Newton constant
Aknur Zholdasbek, Hrishikesh Chakrabarty, Daniele Malafarina +1
We propose an emergent cosmological model rooted in the Asymptotically Safe antiscreening behavior of the Newton constant at Planckian energies. Distinguishing itself from prior ap…
Reply to "Comment" on "Regular evaporating black holes with stable cores"
Alfio Bonanno, Amir-Pouyan Khosravi, Frank Saueressig
We reply to the ``Comment'' on ``Regular evaporating black holes with stable cores'' by R. Carballo-Rubio, F. Di Filippo, S. Liberati, C. Pacilio, and M. Visser. As a key result, w…
The conformal sector of Quantum Einstein Gravity beyond the local potential approximation
Alfio Bonanno, Maria Conti, Dario Zappalà
The anomalous scaling of Newton's constant around the Reuter fixed point is dynamically computed using the functional flow equation approach. Specifically, we thoroughly analyze th…
The gravitational field of a star in quadratic gravity
Alfio Bonanno, Samuele Silveravalle
The characterization of the gravitational field of isolated objects is still an open question in quadratic theories of gravity. We study static equilibrium solutions for a self-gra…
Inflationary solutions in asymptotically safe f(R) theories
Alfio Bonanno, Adriano Contillo, Roberto Percacci
We discuss the existence of inflationary solutions in a class of renormalization group improved polynomial f(R) theories, which have been studied recently in the context of the asy…
Entropy signature of the running cosmological constant
Alfio Bonanno, Martin Reuter
Renormalization group (RG) improved cosmologies based upon a RG trajectory of Quantum Einstein Gravity (QEG) with realistic parameter values are investigated using a system of cosm…
Confronting the IR Fixed Point Cosmology with High Redshift Observations
E. Bentivegna, A. Bonanno, M. Reuter
We use high-redshift type Ia supernova and compact radio source data in order to test the infrared (IR) fixed point model of the late Universe which was proposed recently. It descr…
Cosmology of the Planck Era from a Renormalization Group for Quantum Gravity
A. Bonanno, M. Reuter
Homogeneous and isotropic cosmologies of the Planck era before the classical Einstein equations become valid are studied taking quantum gravitational effects into account. The cosm…
Cosmology with Self-Adjusting Vacuum Energy Density from a Renormalization Group Fixed Point
A. Bonanno, M. Reuter
Cosmologies with a time dependent Newton constant and cosmological constant are investigated. The scale dependence of and is governed by a set of renormalization group equa…