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Claude Cohen Tannoudji

Prix Nobel en 1997 pour le ralentissement et le piégeage des atomes par la lumière laser.

Ses travaux sont à la source des recherches actuelles de l'IFRAF.




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Accueil du site > Séminaires > LKB > Interacting Fermi gases : from superfluidity to spin transport

Interacting Fermi gases : from superfluidity to spin transport

Séminaire de Olga Goulko (DAMTP, Cambridge, UK)

Vendredi 10 juin 2011, 9h15 salle de réunion du siège de l’IFRAF, au 4e étage du bâtiment Rataud, à l’ENS au 45 rue d’Ulm 75005 PARIS

Abstract :

In this talk we will discuss different properties of strongly interacting Fermi gases. At the beginning I will briefly present Determinant Diagrammatic Monte Carlo results for the critical temperature of the spin imbalanced unitary Fermi gas, as well as other thermodynamic observables at the critical point. I will also present some preliminary results for these observables at temperatures beyond the critical point.

The main part of the talk will be about a Boltzmann equation simulation of two colliding clouds of spin polarised fermions. This study was motivated by recent experiments performed at the MIT. When two clouds of fermions are separated in a cigar shaped trap and then released, they collide and for sufficiently strong interactions can bounce off each other several times. This phenomenon allows to study spin transport properties of an interacting Fermi gas. I will describe the numerical setup and discuss the different types of the qualitative behaviour. I will then show how they can be interpreted in terms of the equilibrium properties of the system, and how they relate to the coupling between different excitation modes.

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