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

Accueil > fr > Intranet > Conseil de Laboratoire > Réunions 2017

22 juin

par Valerie Audon - publié le

Conseil de laboratoire du LERMA
22 Juin 2017 à 9h30
Salle 107 de l’UFR de Physique
Couloir 22/23 1er étage
4, Place Jussieu
75005 Paris



I Approbation de l’ordre du jour

II Approbation du compte rendu du Conseil de laboratoire du 20 Février 2017

III Informations du Directeur

IV Demande d’intégration de François Boulanger au LERMA

V Examen des demandes VLD pour l’année 2017-2018


VI Questions diverses

Relevé de conclusions
Compte rendu

Séminaires à venir

Vendredi 16 novembre 2018, 14h00
Salle de l'atelier, Paris
Quantum walks and astrophysical plasmas
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
Vendredi 21 décembre 2018, 14h00
Salle de l'atelier, Paris
Astrochemistry in star forming regions : new modeling approaches
Emeric BRON
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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