title: Induced interactions and the superfluid transition temperature in a three-component Fermi gas.
abstract: We study many-body contributions to the effective interaction between fermions in a three-component Fermi mixture. We find that effective interactions induced by the third component can lead to a phase diagram different from that predicted if interactions with the third component are neglected. As a result, in a confining potential a superfluid shell structure can arise even for equal populations of the components. We also find a critical temperature for the BCS transition in a 6Li mixture which can deviate strongly from the one in a weakly interacting two-component system.
authors.affiliation: NORDITA, Roslagstullsbacken 21, 106 91 Stockholm, Sweden.
authors.forename: J-P
authors.initials: JP
authors.lastname: Martikainen
authors.forename: J J
authors.initials: JJ
authors.lastname: Kinnunen
authors.forename: P
authors.initials: P
authors.lastname: Törmä
authors.forename: C J
authors.initials: CJ
authors.lastname: Pethick