Massimiliano Rinaldi
Education 

2003 Ph.D. in Mathematical Physics, University College Dublin, Ireland. 1999 M.Sc. in Physics, University of Bologna.


Research interests 

Modified Gravity The goal of modified gravity is to explain the current accelerated expansion of the Universe and its initial inflationary phase. In order to do so, the Einstein theory of general relativity is implemented with fundamental fields. One possibility is that this field is nothing but the Higgs boson and this idea turns out to yield a phenomenologically viable theory of inflation. Currently, I am trying to show that this very same model might produce also dark energy, namely the source of the current acceleration of the Universe. Theories of modified gravity will be put at test in 2020 when the Euclid mission will be launched. I am a member of the Euclid Theory Working Group and within this collaboration I am working on modeling viable theories of dark energy. Analog Models of Gravity There is a surprising analogy between photons traveling on curved space and phonons (quantized sound excitations) traveling in a perfect fluid, like a BoseEinstein condensate. In particular, it is possible, at least in principle, to create "sound horizons" that surround regions where phonons cannot escape. Theoretical predictions show that these sound horizons should emit a thermal spectrum of phonons, exactly like an astrophysical black hole horizon emit particles in the form of the famous Hawking radiation. This is just one of the many effects that could be observed in a BEC and that are analogous to effects arising from the physics of quantum fields on curved spacetme. Since the latter are very difficult to observe, the analogy could open the way to interesting insights since experiments seem to be at hand. Quantum Gravity The quantization of the gravitational interactions is a very old problem. All the known quantization schemes fail when applied to gravity, mainly because the theory as it is appears to be nonrenormlizable. There are however approaches that can reveal some useful information like the semiclassical one. In this method, fields are quantized on a classical curved geometry and also renormalized with particular techiniques. Another approach is to assume that quantum fields do not commute at very high energy / short distances so that ultraviolet divergences are removed by construction.


Research work 

Updated publication list: 

Memberships in societies and scientific committees 

From 2017: Gruppo Nazionale di Fisica Matematica  INdAM 

Awards and honours 

2017 Fondo di Finanziamento per la Ricerca di Base (FFARB) 2008 January 8, “Marco Polo Grant” obtained from the University of Bologna, to support three months as visitor in the Physics Department, University of Valencia. 2007 October 1, “G. Puppi  WSF Award for New Talents  2007”, motivated by “his original study on modified dispersion relations and transPlanckian physics.” 2007 September 5, 45th International School of Subnuclear Physics, Erice, Italy, “New Tal ent Award” for the presentation on “Modified dispersion relations and transPlanckian physics.” 2001 Studentship to support doctoral studies abroad, obtained by open competition, from the University of Bologna. 1999 Threeyears doctoral studentship awarded by Enterprise Ireland. 1995 One semester spent at the University College Dublin, supported by an Erasmus stu dentship obtained by open competition. 

Conferences and lectures 

2018 “Scale invariant gravity, black holes and inflation”, plenary speaker, Modern aspects of gravity and cosmology, October 24, 2018, Orsay, France. 2017 “Scale invariant inflation”, Modified Gravity Day, University of Padova, June 16, Italy. 2016 “The EinsteinHiggsYangMills equations as a solution to the Dark Energy problem”, A Century of General Relativity. In the era of Gravitational Wave, September 1218, Cefalu`, Italy. 2015 “Dark energy as a fixed point of the Einstein YangMills Higgs equations”, 28th Texas Symposium on Relativistic Astrophysics, December 1318, Geneva, Switzerland. 2015 “Quasi ScaleInvariant Inflationary Attractors”, 14th Marcel Grossmann Meeting, July 1218, 2015, Rome, Italy. 2015 “Higgs Dark energy”, Euclid Theory and Simulations Working Group Meeting, Jan uary 1213, 2015, Oslo, Norway. 2014 “Inflation from scaleinvariant gravity”, XXI SIGRAV Conference, U. of Piemonte Orientale, September 1519, Alessandria, Italy. 2014 “Higgs met Einstein”, First Flag Meeting “The Quantum and Gravity”, May 2830, Bologna, Italy. 2014 “The Dark Aftermath of Higgs inflation”, Euclid Consortium Meeting, May 59, Mar seille, France. 2014 “Higgs met Einstein”, Workshop on “Problemi Attuali di Fisica Teorica” , April 1116, Vietri, Italy. 2013 “Higgs Monopoles”, 2nd Mediterranean Conference on Classical and Quantum Gravity (2nd MCCQG)”, June 915, Veli Losinj, Croatia. 2012 “Higgs Inflation”, miniworkshop “Higgs search in Belgium”, November 22, CP3 LouvainlaNeuve, Belgium. 2012 “Black Holes in the Lab”, Annual Meeting of the FNRS Graduate School “COM PLEX”, May 25, ULB, Bruxelles, Belgium. 2012 “Cosmology at the Louvain Academy”, Euclid Science Working Groups Meeting, May 16, Copenhagen, Denmark. 2009 “Living in a rough (space)time”, JLAC13, November 24, Gen`eve, Switzerland. 2007 “QFT on curved spacetime with modified dispersion relations”, Ist Workshop on Black Holes and Modified Gravity, Department of Theoretical Physics/IFIC, Decem ber 1721, Universitat de Valencia, Spain. 2007 “Modified Dispersion Relations and Transplanckian Physics”, 45th International School of Subnuclear Physics, Aug 29  Sep 7 , Erice, Italy. 2006 “SelfTdual Brane Cosmology”, 11th Marcel Grossmann Meeting, July 23  29, Berlin, Germany. 

Other work 

Professional consulting Editor of the journal "The European Physics Journal Plus" https://epjplus.epj.org Referee for Classical and Quantum Gravity, General Relativity and Gravitation, Jour nal of Modern Physics A, Nuovo Cimento, International Journal of Modern Physics D, Physical Review D, European Physics Letters, Physics Letters B, European Physics Journal Plus. Consultant for the Estonian Research Council Consultant for the Research Council for Natural Sciences and Engineering at the Academy of Finland.
Event management 2017 Secretary of the Local Organization Committee for the “103◦ Congresso della Societ`a Italiana di Fisica”, 1116 September 2017 Trento, Italy. 2016 Local organiser of the international workshop “II FLAG Meeting: The quantum and gravity”, 68 June 2016, Trento Italy
Public outreach 2018 Popular seminar “Un secolo di relatività”, Liceo Prati, Trento. 2018 Highschool level seminar “Un secolo di relatività”, Istituto Fermi, Mantova, Italy. 2017 Popular seminar “Einstein, buchi neri e onde gravitazionali”, Università della Libera Età, Novellara, Italy. 2017 Popular seminar “Da Einstein alle onde gravitazionali”, Associazione Culturale Ap penappena, Carpi, Italy. 2012 Demonstrator for the science exhibition “L’Univers: face A / face B” held in Namur. 2010 Demonstrator for the science exhibition “Fête de la Science” held in Geneva. 2010 Demonstrator for the PhysiScope, a pedagogical laboratory for physics designed for kids and teenagers at the University of Geneva. 

Attachments 
