LERMA UMR8112

Laboratoire d’Études du Rayonnement et de la Matière en Astrophysique et Atmosphères



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Présentations 2017

par Valerie Audon - publié le

Présentations faites lors de la journée des nouveaux arrivants le 8 décembre 2017 :

- Présentation générale du laboratoire (Darek Lis)
- Informations administratives et financières (Valérie Audon et Murielle Chevrier)
- Point Hygiène et Sécurité (Thibaut Vacelet)
- Formation permanente (Patrice Landry et Nora Roger)
- Outils à disposition : support informatique, accès bibliographiques, site web et projets, ressources autres établissements... (Alain Coulais)
- Présentations des pôles scientifiques (Françoise Combes, Thibaut Le Bertre, Jean-Hugues Fillion, Catherine Prigent)
- Information sur le système de parrainage pour les doctorants (Martina Wiedner)

LERMA general presentation

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Human resources

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Travels and purchases

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Security, Health, Safety

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Continuing Education

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Support informatique

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Pôle 1

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Pole 2

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Pôle 3

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Pôle 4

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Parrainage pour les doctorants

Séminaires à venir

Vendredi 16 novembre 2018, 14h00
Salle de l'atelier, Paris
Quantum walks and astrophysical plasmas
Fabrice DEBBASCH
UPMC, LERMA, Paris
résumé :
Quantum walks (QWs) have been first considered by Feynman in the 1940's and later introduced systematically in the 1990's in the context of quantum information. These discrete automata are a universal quantum computation tool and their first experimental realisation is less than 10 years old (2009).

I will present some of the research conducted at the LERMA since 2012. I will explain that QWs can be viewed as models of Dirac fermions (electrons etc.) interacting with gauge fields like EM fields and gravitation and that QWs can be used to build self-consistent many body theories. These results pave the way towards new numerical simulations and laboratory experiments modelling astrophysical and cosmological relativistic quantum plasmas through QWs.
 
Vendredi 30 novembre 2018, 14h00
Salle de l'atelier, Paris
Bilal LADJELATE
IRAM
 
Vendredi 21 décembre 2018, 14h00
Salle de l'atelier, Paris
Astrochemistry in star forming regions : new modeling approaches
Emeric BRON
IRAM/LERMA
résumé :
Star-forming regions present rich infrared and millimeter spectra emitted by the gas exposed to the feedback of young stars. This emission is increasingly used to study the star formation cycle in other galaxies, but results from a complex interplay of physical and chemical processes : chemistry in the gas and on grain surfaces, (de)excitation processes of the atoms and molecules, heating and cooling balance,... Its understanding thus requires detailed astrochemical models that include the couplings between these processes. In this talk, I will present several examples where new modeling approaches of specific processes and their couplings proved crucial to solve persistent observational riddles : from the driving role of UV irradiation in the dynamics of photodissociation regions (PDR) to the efficient reformation of molecular hydrogen in these regions.
 
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