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Laboratoire d'Annecy-le-Vieux de
Physique Théorique

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LAPTh, an overview

LAPTh is a mixed research unit (UMR 5108) of the CNRS lapth-lapp(within the Institute of Physics, INP) and the Université de Savoie. It is  located in Annecy-le-Vieux, 5km from the centre of Annecy and about 40km from CERN and Geneva.  The activities of LAPTh are centred around three main areas of research:

  • phenomenology of particle physics,
  • astroparticles and cosmology,
  • mathematical physics in particular field and string theory and  aspects of symmetry. 

News

Postdoctoral Position 2026 theoretical cosmology

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The LAPTh (CNRS/USMB) invites expressions of interest for a postdoctoral researcher position in theoretical cosmology. The position is dedicated to developing a robust and efficient framework that incorporates a broad range of neutrino and dark-matter models, assessing their effects on large-scale-structure (LSS) statistics as measured by the power spectrum and bispectrum of galaxies or intensity maps. The project emphasizes spectroscopic galaxy surveys—in particular the analysis of data from the ESA Euclid mission—and 21-cm intensity mapping, especially from the SKA Observatory (SKAO). Our goal is to generalize existing analytic methods—particularly the Effective Field Theory of Large-Scale Structure (EFTofLSS)—to include the effects of massive neutrinos and non-standard dark matter, validate theoretical predictions against simulated datasets, forecast expected constraints from Euclid and SKAO, and ultimately analyze the Euclid spectroscopic galaxy sample in its second data release.

Read more: Postdoctoral Position 2026 theoretical cosmology

 

Postdoctoral positions 2026 String Cosmology

Dark energy equation of state in terms of redshift. A string-inspired quintessence model, with coupling to (dark) matter, gives the green curve, which provides a good fit of the DESI observational data in orange. Taken from arXiv:2505.10410.caption*

 

We invite applications for two postdoctoral positions in string cosmology (broadly defined) in France: one at IP2I (CNRS, UCBL), Lyon, with Dimitrios Tsimpis, and one at LAPTh (CNRS, USMB), Annecy, with David Andriot.

The positions are funded thanks to the ANR Grant DarES.

All information can be found following this link

The application deadline on Dec 14, 2025

*Dark energy equation of state in terms of redshift. A string-inspired quintessence model, with coupling to (dark) matter, gives the green curve, which provides a good fit of the DESI observational data in orange. Taken from arXiv:2505.10410.

   

In memoriam Richard Taillet

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Notre laboratoire est endeuillé à la suite du décès de notre collègue Richard Taillet, survenu le 6 août 2025 des suites d'une maladie foudroyante.

Richard a effectué ses études en tant qu'élève fonctionnaire de l'Ecole Normale Supérieure de Lyon.

Read more: In memoriam Richard Taillet

 

Stagiaires 2025

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Dans le cadre de ses missions, le LAPTh accueille chaque année des étudiants de niveaux Licence à Master 1 & 2. Cette année encore les 3 équipes de recherche du LAPTh ont eu le plaisir d'accueillir un grand nombre de stagiaires. 

A cette occasion l'un de ces stagiaires, Mathis Melki, étudiant en première année du Magistère de physique fondamentale de l'université Paris-Saclay encadré par Eric Ragoucy, directeur de recherche en physique mathématique, a réalisé cette vidéo que nous sommes heureux de partager avec vous.

   

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