Contact
Name
Larissa Lorenz
Position
Former member
Postdoc in CP3 from September 2009 to July 2011
Current position: Researcher in Future Technologies and Innovation (Bauhaus Luftfahrt e.V., Munich).
Projects
I am involved in the following research direction:

Cosmic inflation

The first measurements of acoustic peaks in the CMB anisotropies strongly suggest that the birth of cosmological fluctuations may have taken place during an early inflationary era of the universe.
In this domain, our activities deal with the construction of explicit models of inflation as well as the extraction of their observable consequences. Our fields of expertise comprise some actively debated subjects as the existence of features (e.g. trans-Planckian effects), inflation with non-minimally coupled scalar fields, DBI- and brane inflation as in the context of String Theory.
For all these theories, we are maintaining various numerical tools such as the ASPIC and FieldInf librairies allowing to compute reheating-consistent predictions for comparison with cosmological data.

External collaborators: Jérôme Martin (IAP, Paris, France), Vincent Vennin (Portsmouth, U.K.), Sébastien Clesse (RWTH, Aachen, Germany).

Cosmic strings

Based on our knowledge of particle physics at very high energy, cosmic strings are a natural consequence of the symmetry breaking mechanism and are expected to be formed during the cooling of the universe. However, they have not been observed yet and our research is concentrated into the various effects they may have in cosmology. The technical difficulties to deal with such systems are overcome using super-computer numerical simulations. We are focusing our present work to the effects induced in the CMB and in other astrophysical observables.

External collaborators: Jun'ichi Yokoyama (University of Tokyo, Japan), Daisuke Yamauchi (RESCUE, Tokyo, Japan), Mairi Sakellariadou (King's College London, U.K.), Patrick Peter, François Bouchet (Institut d'Astrophysique de Paris, France).


Show past projects.
Publications in CP3
All my publications on Inspire

2011

Observational signatures of a non-singular bouncing cosmology
Marc Lilley, Larissa Lorenz, Sebastien Clesse
[Abstract] [PDF] [Journal] Published in JCAP 06 (2011) 004.
Refereed paper. 19th April.

2010

Cosmic string loop distribution on all length scales and at any redshift
Larissa Lorenz, Christophe Ringeval and Mairi Sakellariadou
[Abstract] [PDF] [Journal] Published in JCAP 10 (2010) 003
Refereed paper. 7th June.
Geometrically Consistent Approach to Stochastic DBI Inflation
Larissa Lorenz, Jerome Martin, Jun'ichi Yokoyama
[Abstract] [PDF] [Journal] Published in Phys. Rev. D82, 023515 (2010)
Refereed paper. 22nd April.


[UCLouvain] - [SST] [IRMP] - [SC]
Contact : Jérôme de Favereau
Research
Job opportunities EOS be.h : 10 PhD positions