Tag Archives: quantum gravity

Invited talk delivered in Warsaw



The first invited talk for a member of CITR was delivered on Tuesday 28 June 2016 at an international conference in Warsaw, Poland.

The event, entitled “Singularities of general relativity and their quantum fate” was held at the Institute for Mathematics of the Polish Academy of Sciences, and ran from the 27 to the 30 June 2016.

Simone presented his work on the application of affine coherent states to the investigation of black hole and cosmological singularities.

More information can be found on the conference website

Affine quantization of black holes: thermodynamics, singularity removal and displaced horizons



Simone Zonetti
Phys.Rev. D90 (2014) 064046
DOI: 10.1103/PhysRevD.90.064046
e-Print: arXiv:1409.1761


In this work we investigate the thermodynamical properties and modified dynamics of black hole solutions in the semiclassical regime of affine coherent state quantization. Using the weak correspondence principle we build a semiclassical effective action that we use to study thermodynamics in the canonical ensemble and to compare classical analytical solutions with the corresponding semiclassical ones. We determine a strong compatibility of these affine black holes with the thermodynamical properties of the classical counterparts, with only minor restrictions on the free parameters of the models. Furthermore we obtain that black hole singularities are removed by quantum effects, resulting also in a modified extension of the horizon, in agreement with the sign of entropy corrections.

Anna Pachol

Anna Pachol

Research Interests: I’m a theoretical (mathematical) physicist working on noncommutative space-times in approach to Quantum Gravity. In my research I use Quantum Groups framework and some elements of Noncommutative Geometry in the deformation of relativistic symmetries and spacetime.

Currently I am a Postdoc (Junior Principal Investigator, within the Marie Sklodowska Curie COFUND Fellowship –“2020 Researchers : Train 2 Move”(T2M)) at the Dipartimento di Matematica “Giuseppe Peano” (Università degli Studi di Torino) in Italy.

Before that I was Postdoc at Mathematics Division of Science Institute University of Iceland where I moved after finishing my PhD studies at the Institute of Theoretical Physics at University of Wroclaw (Poland).

My current homepage is here.

Area of expertise: Hopf algebras and their deformation, Drinfeld twists, κ-Minkowski spacetime

My publications on INSPIRE and ARXIV

Citations and some more statistics are also here: Google Scholar

My scientific profile is also available on Research Gate


Simone Zonetti

Simone Zonetti

Research Interests: I’m interested in a bunch of topics connected to quantum gravity, from quantum gravitational contributions to the cosmological constant to the effect of quantum corrections to early universe cosmology and black holes thermodynamics

Area of expertise: Lower dimensional gravity models, conformal field theory, quantization of constrained systems, affine quantization

My publications on INSPIRE or arXiv

My profile on Google Scholar

My personal photography website