Cosmology and General Relativity

Louvain-La-Neuve

CP3 - Research directions and experiments
Our research interests range from the understanding of the early universe, the place and time at which the candidate unified theories of Nature may have been at work, to late-time cosmology, data analysis and model testing with cosmological observables.
Our data analysis activities have been focused on the Planck satellite measurements and are now turning to the next generation of CMB polarization experiments, such as the CORE satellite. We are also part of the EUCLID and LISA missions, with measurements of the large scale structure of the Universe and gravitational waves, respectively.
Our works on late-time cosmology concern the reionization era and the development of numerical codes to solve for the cosmological perturbations at second order. For this we have developed the SONG code. In particular, our results are used to implement General Relativity effects within the numerical simulations of the formation of the large scale structures.
With respect to early universe cosmology, we explore the observable consequences of Cosmic Inflation and the existence of topological defects, and maintain the public numerical libraries ASPIC and FieldInf allowing to solve any slow-roll and multifield inflationary models.
Another part of our theoretical activities is concerned with modified gravity theories as well as supersymmetric model building for dark matter candidates.

Projects

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  • We study supersymmetric models in which modifications of the neutrino sector, to include a mass term, are connected to the dark matter sector. We analyse if the dark matter particles can be good dark matter candidates by considering cosmological and astrophysical constraints, as well as if the new neutrino sector can accommodate neutrino data.

  • In July 2018 CP3 members have joined the Virgo Collaboration at the European Gravitational Observatory (EGO) near Pisa in Italy. Virgo is the European laser interferometer for gravitational wave detection. After several years of instrument upgrades, Virgo went in observation mode in August 2017, about one year and half after the two LIGO interferometers in the US had detected for the first time gravitational waves. Virgo and LIGO work in close collaboration, sharing data, analysing data and publishing together. Fundamental research in gravitational wave experimental physics was funded for the first time in Belgium at the end of 2018 with a project led by UCLouvain and ULiege. On the data analysis side the plan is on one side to investigate the properties of binary black hole coalescence events, possibly relating them to theoretical models of dark matter and/or primordial black holes, and on the other to search for a stochastic gravitational wave background originating from the very early moments of the life of the Universe, a discovery that would be foundational for cosmology. On the instrumentation side, contributions to computing and the optical system of the Virgo interferometer are planned.
    CP3 members are also actively supporting the Einstein Telescope project, a proposed underground laser interferometer project for gravitational wave detection that is expected to take over from LIGO and Virgo around 2030.

  • The strong equivalence principle (SEP) does not hold anymore in various extensions of General Relativity. Its violations can be revealed by the non-universality of free-falling for compact objects and we have developed a generic and effective way to test the SEP in the Cosmic Microwave Background (CMB). A violation of the SEP indeed alters the amplitude of the acoustic oscillations in the primeval plasma. Using the WMAP data, we have contrained a possible SEP violation for the baryons.

    Our interests are also focused on the scalar-tensor theories of gravitation and their cosmologies. In a more specific way, we are currently studying a model where the scalar sector is conformally invariant. The effective fluid related to the non-minimally coupled scalar field differs from the other cosmological fluids of radiation by its very particular anisotropic pressure and we are studying its impact on the CMB anisotropies by modifying the CAMB code.

Recent Publications

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  • Glavan, Dražen and Rigopoulos, Gerasimos, September 25, 2019
    Refereed paper. [Abstract] [PDF]

  • Glavan, D. and Miao, S. P. and Prokopec, T. and Woodard, R. P., August 28, 2019
    Refereed paper. [Abstract] [PDF] [Journal]

  • Glavan, D. and Miao, S. P. and Prokopec, T. and Woodard, R. P., August 15, 2019
    Refereed paper. [Abstract] [PDF]

  • Glavan, Dražen and Lin, Chunshan, May 9, 2019
    Refereed paper. [Abstract] [PDF]

  • Philipp Klose, Dr. Carlos Tamarit, Prof. Björn Garbrecht, April 18, 2019
    [Abstract] [PDF]

  • Drewes, Marco, March 27, 2019
    Refereed paper. [Abstract] [PDF]

  • Sprenger, Tim and Archidiacono, Maria and Brinckmann, Thejs and Clesse, Sébastien and Lesgourgues, Julien, February 6, 2018
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Penna-Lima, M. and Vitenti, S. D. P. and Alves, M. E. S. and de Araujo, J. C. N. and Carvalho, F. C., January 19, 2018
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Vincent Boucher, Simon de Visscher and Christophe Ringeval, January 15, 2018
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Garcia-Bellido, Juan and Clesse, Sebastien and Fleury, Pierre, December 21, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Clesse, Sebastien and García-Bellido, Juan, December 21, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • García-Bellido, Juan and Clesse, Sebastien, December 21, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Alves, M. E. S. and Carvalho, F. C. and de Araujo, J. C. N. and Penna-Lima, M. and Vitenti, S. D. P., November 28, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Drewes, Marco and Kang, Jin U and Mun, Ui Ri, November 22, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial] [Full text]

  • Drewes, M. and Garbrecht, B. and Hernandez, P. and Kekic, M. and Lopez-Pavon, J. and Racker, J. and Rius, N. and Salvado, J. and Teresi, D., November 20, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • A. Vafaei Sadr, S. Movahed, M. Farhang, C. Ringeval and F. R. Bouchet, October 3, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Christophe Ringeval and Teruaki Suyama, September 13, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Christian Fidler and Christophe Ringeval, September 6, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Fidler, Christian and Tram, Thomas and Rampf, Cornelius and Crittenden, Robert and Koyama, Kazuya and Wands, David, September 4, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Adamek, Julian and Brandbyge, Jacob and Fidler, Christian and Hannestad, Steen and Rampf, Cornelius and Tram, Thomas, September 4, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Fidler, Christian and Tram, Thomas and Rampf, Cornelius and Crittenden, Robert and Koyama, Kazuya and Wands, David, September 4, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Fidler, Christian and Pitrou, Cyril, September 4, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Bacalhau, Anna Paula and Pinto-Neto, Nelson and Dias Pinto Vitenti, Sandro, June 28, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Delabrouille, J. and others, June 16, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Doux, Cyrille and Penna-Lima, Mariana and Vitenti, Sandro D. P. and Tréguer, Julien and Aubourg, Eric and Ganga, Ken, June 15, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Bacalhau, Anna Paula and Peter, Patrick and D. P. Vitenti, Sandro, May 16, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Finelli, Fabio and others, January 10, 2017
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Di Valentino, Eleonora et al., December 2, 2016
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • J. D. McEwen, S. M. Feeney, H. V. Peiris, Y. Wiaux, C. Ringeval and F. R. Bouchet, December 2, 2016
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jacob Brandbyge, Cornelius Rampf, Thomas Tram, Florent Leclercq, Christian Fidler, Steen Hannestad, October 26, 2016
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jerome Martin, Christophe Ringeval and Vincent Vennin, September 16, 2016
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Fidler, Christian and Tram, Thomas and Rampf, Cornelius and Crittenden, Robert and Koyama, Kazuya and Wands, David, July 4, 2016
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jérôme Martin, Christophe Ringeval and Vincent Vennin, March 9, 2016
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Tram, Thomas and Fidler, Christian and Crittenden, Robert and Koyama, Kazuya and Pettinari, Guido W. and Wands, David, March 1, 2016
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Vincent Vennin, Jérôme Martin and Christophe Ringeval, December 11, 2015
    Refereed paper. [Journal] [Full text]

  • Fidler, Christian and Pettinari, Guido and Pitrou, Cyril, November 25, 2015
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Christophe Ringeval, Daisuke Yamauchi, Jun'ichi Yokoyama and François R. Bouchet, October 8, 2015
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jose Beltran Jimenez, Lavinia Heisenberg, Gonzalo J. Olmo and Christophe Ringeval, September 22, 2015
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Fidler, Christian and Rampf, Cornelius and Tram, Thomas and Crittenden, Robert and Koyama, Kazuya and Wands, David, May 21, 2015
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Ismael Ayuso, Jose Beltran Jimenez and Alvaro de la Cruz Dombriz, December 9, 2014
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jose Beltrán Jiménez, Lavinia Heisenberg and Gonzalo Olmo, October 30, 2014
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jerome Martin, Christophe Ringeval and Vincent Vennin, October 30, 2014
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jerome Martin, Christophe Ringeval and Vincent Vennin, July 16, 2014
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Ade, P.A.R. and others, July 11, 2014
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jerome Martin, Christophe Ringeval, Roberto Trotta and Vincent Vennin, June 1, 2014
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jose Beltran Jimenez, Alvaro de la Cruz-Dombriz, P.K.S. Dunsby and Diego Saez-Gomez, March 17, 2014
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jose Beltran Jimenez, Vincenzo Salzano and Ruth Lazkoz, March 3, 2014
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jose Beltran Jimenez and Tomi S. Koivisto, March 3, 2014
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Marcello Musso and Ravi K. Sheth, February 3, 2014
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Marcello Musso and Ravi K. Sheth, January 15, 2014
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jerome Martin, Christophe Ringeval, Roberto Trotta and Vincent Vennin, December 13, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Christophe Ringeval, December 10, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jose Beltrán Jiménez, Ruth Durrer, Lavinia Heisenberg and Mikjel Thorsrud, September 4, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Marcello Musso and Ravi K. Sheth, June 4, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Marcello Musso and Ravi K. Sheth, May 6, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jerome Martin, Christophe Ringeval and Vincent Vennin, March 25, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Planck Collaboration, March 25, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Planck Collaboration, March 25, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jose Beltran Jimenez, Marcello Musso and Christophe Ringeval, March 15, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jerome Martin, Christophe Ringeval and Vincent Vennin, March 12, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Christophe Ringeval, Teruaki Suyama and Jun'ichi Yokoyama, February 26, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Patrick Peter and Christophe Ringeval, February 6, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jose Beltran Jimenez, Paulo Santos and David F. Mota, January 11, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Sachiko Kuroyanagi, Christophe Ringeval and Tomo Takahashi, January 10, 2013
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jose Beltrán Jiménez, Andre Luis Delvas Froes and David F Mota, December 12, 2012
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Christophe Ringeval, September 12, 2012
    Contribution to proceedings. [Journal] [Full text]

  • Sebastien Clesse, Laura Lopez-Honorez, Christophe Ringeval, Hiroyuki Tashiro and Michel H. G. Tytgat, August 21, 2012
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Xingang Chen and Christophe Ringeval, May 29, 2012
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Marcello Musso, Aseem Paranjape and Ravi K. Sheth, May 17, 2012
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Christophe Ringeval and François R. Bouchet, April 24, 2012
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Vittoria Demozzi and Christophe Ringeval, February 15, 2012
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Marcello Musso and Ravi K. Sheth, January 23, 2012
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jean-Marc Gérard, January 10, 2012
    Refereed paper. [Full text]

  • Marc Lilley, Larissa Lorenz, Sebastien Clesse, April 19, 2011
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Tashiro, Hiroyuki and Sugiyama, Naoshi, April 4, 2011
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Tashiro, Hiroyuki and Takahashi, Keitaro and Ichiki, Kiyotomo, October 22, 2010
    Refereed paper. [Abstract] [PDF]

  • Jerome Martin, Christophe Ringeval and Roberto Trotta, September 22, 2010
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Hiroyuki Tashiro, Nabila Aghanim, Mathieu Langer, Marian Douspis, Saleem Zaroubi, Vibor Jelic, August 31, 2010
    Refereed paper. [Abstract] [PDF]

  • Y. Rasera, J-M. Alimi, J. Courtin, F. Roy, P-S. Corasaniti, A. Füzfa and V. Boucher, July 15, 2010
    Contribution to proceedings. [Abstract] [PDF] [Journal] [Dial]

  • Sébastien Clesse, June 23, 2010
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Sébastien Clesse, June 23, 2010
    Contribution to proceedings. [Abstract] [PDF]

  • Larissa Lorenz, Christophe Ringeval and Mairi Sakellariadou, June 7, 2010
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Christophe Ringeval, Teruaki Suyama, Tomo Takahashi, Masahide Yamaguchi, Shuichiro Yokoyama, June 3, 2010
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Christophe Ringeval, May 27, 2010
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Antonio De Felice, Jean-Marc Gerard and Teruaki Suyama, May 14, 2010
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jerome Martin and Christophe Ringeval, May 3, 2010
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Larissa Lorenz, Jerome Martin, Jun'ichi Yokoyama, April 22, 2010
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Lilley, Marc and Di Marco, Fabrizio and Martin, Jerome and Peter, Patrick, March 29, 2010
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Seán Murray, Christophe Ringeval and Simone Zonetti, February 26, 2010
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Sébastien Clesse, February 2, 2010
    Contribution to proceedings. [Abstract] [PDF] [Journal]

  • Jérôme Courtin, Yann Rasera, Jean-Michel Alimi, Pier-Stefano Corasaniti, Vincent Boucher, André Füzfa, January 20, 2010
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Kobayashi, Tsutomu and Tashiro, Hiroyuki and Suzuki, Daichi , January 20, 2010
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Mark Hindmarsh, Christophe Ringeval and Teruaki Suyama, November 6, 2009
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Christophe Ringeval, October 12, 2009
    Contribution to proceedings. [Abstract] [PDF] [Journal] [Dial]

  • Sébastien Clesse, Christophe Ringeval, Jonathan Rocher, September 2, 2009
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Antonio De Felice, Jean-Marc Gerard and Teruaki Suyama, August 25, 2009
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Mark Hindmarsh, Christophe Ringeval and Teruaki Suyama, August 4, 2009
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Antonio De Felice and Teruaki Suyama, July 31, 2009
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Antonio De Felice and Shinji Tsujikawa, July 13, 2009
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Francesco Cianfrani, Giovanni Montani, Simone Zonetti, April 27, 2009
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Antonio De Felice and Teruaki Suyama, April 14, 2009
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Francesco Cianfrani, Giovanni Montani, Simone Zonetti, April 6, 2009
    Contribution to proceedings. [Abstract] [PDF]

  • Antonio De Felice and Christophe Ringeval, April 2, 2009
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jean-Michel Alimi, André Füzfa, Vincent Boucher, Yann Rasera, Jérôme Courtin, Pier-Stefano Corasaniti, March 31, 2009
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • A. Füzfa, J.-M. Alimi, December 31, 2008
    Contribution to proceedings. [Abstract] [PDF] [Journal]

  • Antonio De Felice and Shinji Tsujikawa, November 3, 2008
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • J.-M. Alimi, A. Füzfa, October 3, 2008
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • J.-M. Alimi, A. Füzfa, October 3, 2008
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Sébastien Clesse and Jonathan Rocher, September 26, 2008
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Antonio De Felice and Christophe Ringeval, September 2, 2008
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Larissa Lorenz, Jerome Martin and Christophe Ringeval, July 18, 2008
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Larissa Lorenz, Jerome Martin and Christophe Ringeval, July 15, 2008
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Antonio De Felice, Salvatore Capozziello, June 27, 2008
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • A. Füzfa, J.-M. Alimi, December 6, 2007
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Larissa Lorenz, Jérôme Martin, Christophe Ringeval, September 24, 2007
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Aurélien Fraisse, Christophe Ringeval, David Spergel and François Bouchet, August 13, 2007
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Christophe Ringeval, Mairi Sakellariadou, François R. Bouchet, February 19, 2007
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Christophe Ringeval, January 14, 2007
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • Jean-Marc Gerard, July 5, 2006
    Refereed paper. [Abstract] [PDF] [Journal] [Dial]

  • V. Boucher, September 26, 2005
    Contribution to proceedings. [Abstract] [PDF]