Ultra-cold Fermi Gases From Molecular Bose-Einstein Condensation to BCS Pairing CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE Bose-E condensate Fermi sea College de france Thomas Bourdel, Julien Cubizolles, K Magalhaes Servaas Kokkelmans, Dima Petrov, Gora Shlyapnikov Christophe Salomon Laboratoire Kastler Brossel, Ecole Normale Superieure, Paris Orsay, 20 novembre 2003
Ultra-cold Fermi Gases From Molecular Bose-Einstein Condensation to BCS Pairing Ultra-cold Fermi Gases From Molecular Bose-Einstein Condensation to BCS Pairing Thomas Bourdel, Julien Cubizolles, K. Magalhaes Servaas Kokkelmans, Dima Petrov, Gora Shlyapnikov Christophe Salomon Laboratoire Kastler Brossel, Ecole Normale Supérieure, Paris, Orsay, 20 novembre 2003 Collège de France
Molecular Bose-Einstein Condensate and Fermi Superfluidity Two component Fermi gas at very low temperature s-wave interaction, scattering length a a>0 a<0 Molecular bec Fermi superfluid See Science news tocus Feshbach resonance August 8th, 2003
Molecular MolecularBBose-Einstein ose-EinsteinCondensate CondensateaandndFermi Superfluidity Fermi Superfluidity Two component Fermi gas at very low temperature s-wave interaction, scattering length a a > 0 a < 0 Molecular BEC ? Fermi superfluid ? See Science news focus, Feshbach August 8th, 2003 resonance
Outline o Basics of dilute trapped Bose and Fermi gases Search for superfluidity in Fermi gas o Study of Li Feshbach resonance Measurement of the interaction energy near a feshbach resonance Fermions in the strongly interacting regime O Formation of ultra-cold long-lived molecules near Feshbach resonance Reversible process between Fermi and Bose gases 2, Li2 dimer molecules o Bose-Einstein condensation of molecules ○ Perspectives
Outline Outline Basics of dilute trapped Bose and Fermi gases Study of 6Li Feshbach resonance - Measurement of the interaction energy near a Feshbach resonance - Fermions in the strongly interacting regime Search for superfluidity in Fermi gas Formation of ultra-cold long-lived molecules near Feshbach resonance Reversible process between Fermi and Bose gases 40K2 , 6Li2 dimer molecules Bose-Einstein condensation of molecules Perspectives
Bose-Einstein Condensation in Atomic Gases o Bose-Einstein condensate SCiENCE Rubidium Bose enhancement ho (0.83 O 1995 E. Cornell /C. Wieman W. Ketterle o Rb Na LiH *He K. Cs. Yb K. Li dimers of fermions Sodium
Bose -Einstein Condensation in Atomic Bose -Einstein Condensation in AtomicGases Gases Bose-Einstein condensate Rubidium Bose enhancement MI T T>Tc T<Tc T<<Tc Sodium (0.8 3 N)1/3 T = C k B h ω Rb, Na, Li, H, *He, K, Cs, Yb, K 2, Li2: dimers of fermions 1995 E. Cornell /C. Wieman, W. Ketterle
Prix nobel de physique 1997 S Chu, C. Cohen Tannoudji, W. Phillips Manipulation d'atomes par laser Prix nobel de physique 2001 E. Cornell, W. Ketterle, C. Wieman Condensation de bose-Einstein colueadzs
Prix Nobel de physique 1997 S. Chu, C. Cohen Tannoudji, W. Phillips Manipulation d’atomes par laser Prix Nobel de physique 2001 E. Cornell, W. Ketterle, C. Wieman Condensation de Bose-Einstein