FLAG
Quantum Fields in Gravity, Cosmology and Black Holes
NEWS: Postdoctoral research grant on the Field Theory of Gravity, Cosmology and BHs (link)
Abstract
Our collaboration focuses on topics where both gravity and quantum physics are relevant, ranging from the investigation of the gravitational interaction at the fundamental level, to the study of black hole physics and cosmological models. Issues of the largest impact are the understanding of black hole formation and Hawking evaporation, and cosmological inflation as the standard paradigm of the early universe, dark energy and dark matter. Beside the well established formalism of quantum field theory (QFT) in curved space-times, which still provides us with a very powerful tool for studying quantum effects in semiclassical gravity, today’s novelty is the possibility to formulate theoretical descriptions for the fully quantum regime of gravity, and in forms which can lead to concrete predictions for astrophysics and cosmology. This is attained by employing advanced quantum field theory methods, like effective actions in the renormalisation group approach to high-energy regimes and string inspired generalised uncertainty principles, along with corpuscular models of specific self-gravitating systems. Our activities can be divided into the following specific fields:
- Effective QFT of gravity:
- asymptotic safety;
- virtual and real black holes states in the UV-completion of gravity (classicalisation)
- rigorous QFT on curved space-time;
- general f(R) theories of gravity;
- QFT in de Sitter and anti-de Sitter spaces.
- Black hole physics
- formation of trapping surfaces and onset of Hawking evaporation in gravitational collapse of astrophysical objects;
- persistence of classical singularities in the quantum theory and regular black holes;
- microscopic models of black holes as BECs of gravitons;
- analogue models of Hawking radiation;
- Cosmology
- inflationary scenario and the CMB;
- dark energy;
- modified gravity models;
- child universe formation;
- dark matter.
FLAG
Quantum Fields in Gravity, Cosmology and Black Holes
BOLOGNA
Staff: Alessandro Tronconi, Roberto Casadio, Kamenschchik Alexander, Alessandro Pesci, Gian Paolo Vacca, Gabriele Gionti, Andrea Mentrelli, Gianmassimo Tasinato
Postdoc: Max Joseph Fahn, Riccardo Martini
PhD Students: Wenbin Feng, Polina Petriakova
CATANIA
Staff: Alfio Bonanno, Giuseppe Puglisi, Dario Zappalà
Phd Students: Giacometti Gabriele, Glaviano Emiliano Maria, Panassiti Antonio, Spina Andrea
MILANO
Staff: Ugo Moschella, Sergio Cacciatori, Oliver Fabio Piattella, Remo Garattini
PhD Students: Federico Scali, Valeria Rossi, Anthony Massida, Matteo Fontana, Gabriele Bianchi
PISA
Staff: Omar Zanusso, Giovanni Marozzi
PhD Students: Gregorio Paci, Luca Parente
TRENTO
Staff: Luciano Vanzo, Massimiliano Rinaldi, Sunny Vagnozzi
Postdoc: Marco Calzà, Simony Santos Da Costa, Guan-Wen Yuan
PhD Students: Chiara Cecchini, Davide Pedrotti
TRIESTE
Staff: Stefano Ansoldi, Piero Nicolini, Roberto Percacci, Samilagic Anais, Euro Spallucci
Postdoc: Daniele Pranzetti
PhD Students: Diego Buccio, Gianfranco De Simone, Alessandro Longo, Marco Pasini, Domenico Giuseppe Salluce
SELECTED PUBLICATIONS
BOLOGNA
- R. Casadio and R. da Rocha, "Stability of the graviton Bose–Einstein condensate in the brane-world", Phys. Lett. B 763 (2016) 434.
- R. Casadio, A. Giugno and A. Giusti, "Matter and gravitons in the gravitational collapse", Phys. Lett. B 763 (2016) 337.
- R. Percacci and G.P. Vacca, "Search of scaling solutions in scalar–tensor gravity", Eur. Phys. J. C 75 (2015) 188.
- A.Y. Kamenshchik, A. Tronconi and G. Venturi, "Non-canonical inflation and primordial black holes production", Phys. Lett. B 791 (2019) 201.
- A.Y. Kamenshchik and C.F. Steinwachs, "Question of quantum equivalence between Jordan frame and Einstein frame", Phys. Rev. D 91 (2015) 084033.
- A. Pesci, "Minimum-length Ricci scalar for null separated events", Phys. Rev. D 102, no. 12, (2020) 124057.
- A. Bonanno, G. Gionti, S.J. and A. Platania, "Bouncing and emergent cosmologies from Arnowitt–Deser–Misner RG flows", Class. Quant. Grav. 35 (2018) no.6, 065004
CATANIA
- A. Bonanno, M. Park, L. Rachwał, D. Zappalà, "On the regularization of Lifshitz-type field theories", The European Physical Journal C volume 80, Article number: 1081 (2020)
- A. Bonanno, S. Lippoldt, R. Percacci, G. Vacca, "On exact proper time Wilsonian RG flows", (2020) The European Physical Journal C, Volume 80, Issue 3, article id.249
- A. Bonanno, S. Silveravalle, "Characterizing black hole metrics in quadratic gravity", (2019) Physical Review D, Volume 99, Issue 10, id.101501
- D. Zappala, "Indications of isotropic Lifshitz points in four dimensions" (2018): Phys. Rev. D 98, 085005
MILANO
- F. Belgiorno, S.L. Cacciatori and A. Viganò, "Analog Hawking effect: A master equation", Phys. Rev. D 102 (2020) no.10, 105003
- D. Astesiano and S.L. Cacciatori, "Super throats with non trivial scalars," JHEP 07 (2020), 017
- P.D. Alvarez, S.L. Cacciatori, F. Canfora and B.L. Cerchiai, "Analytic SU(N) Skyrmions at finite Baryon density," Phys. Rev. D 101 (2020) no.12, 125011
- F. Belgiorno and S.L. Cacciatori, "Analogous Hawking Effect in Dielectric Media and Solitonic Solutions", Universe 6 (2020) no.8, 127
- E. T. Akhmedov, K. V. Bazarov, D. V. Diakonov and U. Moschella, "Quantum fields in the static de Sitter universe", Phys. Rev. D 102 (2020) no.8, 085003
- H. Epstein and U. Moschella, "QFT and topology in two dimensions: $SL(2,{\Bbb R})$-symmetry and the de Sitter universe", [arXiv:2002.12084 [hep-th]]. AHP to appear 2021
- R. Garattini, "Generalized Absurdly Benign Traversable Wormholes powered by Casimir Energy" Eur. Phys. J. C 80 (2020) no.12, 1172
TRENTO
- E. Babichev, C. Charmousis, A. Cisterna and M. Hassaine, "Regular black holes via the Kerr-Schild construction in DHOST theories", JCAP 06 (2020), 049
- F. Bombacigno, S. Boudet and G. Montani, "Generalized Ashtekar variables for Palatini $f(\mathcal {R})$ models", Nucl. Phys. B 963 (2021), 115281
- A. Casalino, L. Sebastiani, L. Vanzo, S. Zerbini, "Higher derivative and mimetic models on non flat FLRW space–times", Phys.Dark Univ. 29 (2020) 100594
- S. Vicentini, L. Vanzo, M. Rinaldi "Scale-invariant inflation with one-loop quantum corrections" Phys.Rev.D 99 (2019) 10, 103516
- A. Bonanno and S. Silveravalle, "Characterizing black hole metrics in quadratic gravity", Phys.Rev.D 99 (2019) 10, 101501
- L. Sebastiani, L. Vanzo, S. Zerbini “Action growth for black holes in modified gravity” Phys.Rev.D 97 (2018) 4, 044009
TRIESTE
- R. Abbott et al. "Upper Limits on the Isotropic Gravitational-Wave Background from Advanced LIGO's and Advanced Virgo's Third Observing Run LIGO Scientific and Virgo and KAGRA Collaborations", e-Print: 2101.12130 [gr-qc]
- K. Falls, M. Herrero-Valea "Frame (In)equivalence in Quantum Field Theory and Cosmology"", Eur.Phys.J.C 79 (2019) 7, 595
- A. Bonanno, A. Eichhorn, H. Gies, J. M. Pawlowski, R. Percacci, M. Reuter, F. Saueressig, G.P. Vacca "Critical reflections on asymptotically safe gravity"", Front.in Phys. 8 (2020) 269
- K. Falls, N. Ohta, R Percacci "Towards the determination of the dimension of the critical surface in asymptotically safe gravity", Phys.Lett.B 810 (2020) 135773
- R. Alkofer, A. Eichhorn, A. Held, C.M. Nieto , R. Percacci, M, Schroefl "Quark masses and mixings in minimally parameterized UV completions of the Standard Model", Annals Phys. 421 (2020) 168282
- R. Percacci, E. Sezgin, "New class of ghost- and tachyon-free metric affine gravities", Phys.Rev.D 101 (2020) 8, 084040
- P. Nicolini, E. Spallucci, M.F. Wondrak "Quantum Corrected Black Holes from String T-Duality" Phys.Lett.B 797 (2019) 134888
- E. Spallucci, A. Smailagic "Regular black holes from semi-classical down to Planckian size" Int.J.Mod.Phys.D 26 (2017) 07, 1730013
GAGRA
Gauge Theories and Gravity (without relying on
supersymmetry)
Abstract
GAGRA is an INFN national specific initiative whose aim is, among other ones, to employ new methods based on recent developments (M. Bochicchio [1,2,3]) for the understanding of confining asymptotically free gauge theories -- specifically of the 't Hooft large-N limit of QCD -- and for the consistent quantization of gravity (D. Anselmi [4,5,6]) that do not rely either on the simplifications furnished by the supersymmetry or on the superstring unification of all the interactions respectively.
A key role in the development of the aforementioned methods is played by the high-energy features of both large-N QCD (M. Bochicchio [1,3]) or, more generally, asymptotically free gauge theories, and of gravity (D. Anselmi [4,5]), mostly in relation to the non-perturbative (M. Bochicchio [1,3], M. Papinutto [7], D. Anselmi [4,6], F. Scardino) and perturbative (M. Becchetti [8], A. Quadri [9]) renormalization properties of the S-matrix amplitudes and correlators.
On the gauge side, the aforementioned methods provide the strongest constraints [1,2] on the high-energy non-perturbative structure of large-N QCD, and may be a powerful guide [3] to eventually construct candidates for its partial solution.
On the gravity side, the aforementioned methods have led to the construction [4] of a renormalizable [5] unitary S matrix for gravity, by means of an underlying quantization of general relativity that violates [6] microcausality.
Moreover, complementary -- but crucial -- aims are the exploration of the non-perturbative low-energy features of QCD by lattice gauge theories (M. Papinutto, F. Russo) and QCD phenomenology (A. Polosa [10], A. Pilloni [10]) and, on the gravity side, the experimental search for dark matter (A. Polosa [11]).
Map of INFN facilities
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