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Theoretical Cosmology Research Group
Group Members
Staff:
| Thomas Buchert (PR, Head of Group, CRALyon)
| - coordination of group activities
| Alexandre Arbey (MCF, CRALyon)
| - scalar field theories - Dark Energy and Dark Matter
| Martin France (Research Technician, CRALyon)
| - robust image analysis - Minkowski Functionals
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| | Associates:
| Frank Steiner (PR, CRALyon)
| - CMB and non-trivial topologies - Dark Energy
| Sven Lustig (Postdoc, University of Ulm / CRALyon)
| - CMB and non-trivial topologies - Dark Energy
| Nathaniel Obadia (AGPR, ENS-Lyon)
| - inhomogeneous inflation and other scalar field models - Dark Energy
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| Students:
| Charly Nayet (Ph.D. student, CRALyon)
| - exact solutions and generic evolution models - Dark Energy
| Xavier Roy (Ph.D. student, CRALyon)
| - inhomogeneous inflation and other scalar field models, foliation problem - Dark Energy
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| | Associated Students:
| Matthias Ostermann (Ph.D. student, Munich, Germany)
| - relativistic Lagrangian perturbation theory
| Alexander Wiegand (Ph.D. student, University of Bielefeld, Germany)
| - multi-scale models and relations to Dark Energy and Dark Matter
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Projects
Current Collaborators
| Mauro Carfora (University of Pavia, Italy)
| - Renormalization of average characteristics, Ricci-Hamilton-Perelman flow - Dark Energy
| George F.R. Ellis (University of Cape Town, South Africa)
| - averaging scales, fundamental issues - Dark Energy and Dark Matter
| Henk van Elst (Merkur Internationale FH Karlsruhe, Germany)
| - relations to post-Newtonian theories, averaging problem - Dark Energy
| Akio Hosoya (Tokyo Institute of Technology, Japan)
| - averaging problem, information theory - Dark Energy
| Masaaki Morita (Okinawa National College of Technology, Japan)
| - averaging problem, information theory - Dark Energy
| Yasushi Suto (University of Tokyo, Japan)
| - morphological analyses of fluctuations in the SDSS
| Chiaki Hikage (University of Cardiff, United Kingdom)
| - morphological analyses of fluctuations in the SDSS
| Herbert Wagner (University of Munich, Germany)
| - morphological analyses, fundamental issues
| Martin Kerscher (University of Munich, Germany)
| - averaging problem, numerical simulations - Dark Energy
| Dominik J. Schwarz (University of Bielefeld, Germany)
| - perturbation theory, averaging on the lightcone - Dark Energy and Dark Matter
| Aleksandar Rakič (University of Würzburg, Germany)
| - averaging on the lightcone - Dark Energy and Dark Matter
| Nan Li (University of Bielefeld, Germany)
| - perturbation theory, information theory - Dark Energy
| Jean-Michel Alimi (Luth, Observatoire de Paris, France)
| - the `morphon' approach, comparison with observations - Dark Energy
| Julien Larena (University of Cape Town, South Africa)
| - averaging on the lightcone, comparison with observations - Dark Energy
| Pier-Stefano Corasaniti (Luth, Observatoire de Paris, France)
| - comparison with observations, CMB, Supernovae - Dark Energy
| Martin Kunz (University of Sussex, Brighton, United Kingdom)
| - comparison with observations, CMB, Supernovae - Dark Energy
| Alberto Carlini (University of Alessandria, Italy)
| - variational approach to backreaction, topological issues - Dark Energy
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Recent Publications
2008a:
'Dark Energy from structure - a status report'
T. Buchert,
Gen. Rel. Grav. 40, 467-527. (Invited review for special issue on Dark Energy)
2008b:
'Reinterpreting dark energy through backreaction: the minimally coupled morphon field'
J. Larena, T. Buchert and J.-M. Alimi,
in: Proceedings of the 11th Marcel Grossman Meeting, Berlin, Germany ,
H. Kleinert, R.T. Jantzen, R. Ruffini (eds.), World Scientific, 2008, p. 1831.
2008c:
'Ricci flow deformation of cosmological initial data sets'
M. Carfora and T. Buchert,
in: 14th International Conference on Waves and Stability in Continuous Media,
N. Manganaro, R. Monaco, S. Rionero, World Scientific, 2008, 118-127.
2008d:
'On the curvature of the present-day Universe'
T. Buchert and M. Carfora,
Class. Quant. Grav. 25, 195001.
2009a:
'Testing backreaction effects with observations'
J. Larena, J.-M. Alimi, T. Buchert, M. Kunz and P.-S. Corasaniti,
Phys. Rev. D 79, 083011.
2009b:
'Geometrical order-of-magnitude estimates for spatial curvature in realistic models of the Universe'
T. Buchert, G.F.R. Ellis and H. v. Elst,
Gen. Rel. Grav. 41, 2017-2030. (Special Issue in memoriam Jürgen Ehlers)
2009c:
'On the Newtonian limit of the Weyl tensor'
J. Ehlers and T. Buchert,
Gen. Rel. Grav. 41, 2153-2158. (Special Issue in memoriam Jürgen Ehlers)
2009d:
'Proceedings 2nd CRAL-IPNL conference - Dark Energy and Dark Matter: Observations, Experiments and Theories'
Lyon, July 7-11, 2008, France, EAS Publication Series 36, EDP Sciences,
E. Pécontal, T. Buchert, P. Di Stefano, Y. Copin.
2010a:
'Relative information entropy of an inhomogeneous Universe'
M. Morita, T. Buchert, A. Hosoya and N. Li,
`Invisible Universe', Paris 2009. AIP Conference Proceedings: Volume 1241, 1074-1082.
2010b:
'Chaplygin gas and effective description of inhomogeneous universe models in general relativity'
X. Roy and T. Buchert,
Class. Quant. Grav. 27, 175013.
2010c:
'Multiscale cosmology and structure-emerging Dark Energy: a plausibility analysis'
A. Wiegand and T. Buchert,
Phys. Rev. D 82, 023523.
Last Update: July 27, 2010
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ARTHUS 
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