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Productions scientifiques

► From cold atoms to hot carriers : quantum processes for solar energy conversion

Post doctorat JSPS-CNRS au Okada-lab / NextPV (RCAST, Université de Tokyo) sous la direction de Yoshitaka Okada et Jean-François Guillemoles.

► Thèse : Simulating the dynamics of harmonically trapped Weyl particles with cold atoms

Thèse de Physique au laboratoire Kastler Brossel sous la direction de Christophe Salomon & Frédéric Chevy sur les gaz de Fermions Ultrafroids (expérience FERMIX).

Soutenue le 8 Juillet 2016 devant un jury présidé par Philipe Grangier et constitué par Frédéric Chevy, Leonardo Fallani, Jean-Noël Fuchs, Jean-Claude Garreau, Philippe Grangier et Christophe Salomon

Le manuscrit peut être téléchargé (en anglais) ici.

During my PhD, I contributed to the design and construction of the FERMIX experiment, dedicated to the study of a 6Li-40K fermionic mixture at ultra low temperatures. Our main results are twofold. First, we developed a new sub-Doppler laser cooling scheme, taking advantage of the existence of dark states in the D1 line of alkali atoms. This so-called grey molasses allows for a phase space density up to 10^4, the highest value reported for the simultaneous laser cooling of those two species. The improvement due to this cooling step enabled the production of a quantum degenerate 40K gas in a dipole trap, with 3x10^5 atoms in two spin states at 62 nK, corresponding to 17% of the Fermi temperature. Second, introducing a canonical mapping, we showed that non-interacting ultrarelativistic particles (Weyl fermions) in a harmonic trap can be simulated by cold fermions confined in a quadrupole potential. We study experimentally, numerically and theoretically the relaxation of these systems towards a steady state which can not be described by a Boltzman distribution, but rather presents strongly anisotropic effective temperatures. This analogy also allows us to translate fundamental properties of relativistic particles in the language of cold atoms. In particular, we demonstrate that the Klein paradox is equivalent to Majorana losses. Finally, we present a theoretical study of the long range interactions between particles confined in two 2D layers immersed in a 3D atomic cloud. We show that mediated interactions can be studied experimentally by measuring the beat-note of two clouds confined in neighboring planes of an optical lattice.

Des mémos et démos rédigés dans le cadre de ma thèse :

► Publications scientifiques

► Autres publications

  • Cent ans de Physique et de Magie, une illustration du Tractatus des Gentils Commentateurs Multidisciplinaires

    Daniel Suchet et David Elghozi

    Projet laureat du festival Arts et Sciences CURIOSITas de la Diagonale Paris Sacaly, prix special de la fiction de la science du festival de communication scientifique de la communauté de commune du plateau de Saclay A plein volume.

    Alliage, vol 76 (2016)

  • International Physicists’ Tournament A problem-solving competition for university students

    Viven Bonvin, Maxime Harazi et Daniel Suchet

    Soumis à European Journal of Physics

  • Traduire la Physique

    Daniel Suchet

    Ecritures, vol 9 "Indiscipliner la traduction", ISBN 2-84016-265-2 (2017)

  • Launch of Emergent Scientist: hands on peer-review publication for science students (editorial)

    Daniel Suchet

    Emergent Scientist, vol 1 (2017)

  • La Quête des Températures Ultrabasses

    Daniel Suchet

    in Le Froid, édité par D. Chartier (UQAM) (2016, à paraître)

► Rapports de recherche

Des documents rédigés lors de mes précédentes expériences de recherche.