Induced interactions and the superfluid transition temperature in a three-component Fermi gas.
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.
Martikainen
J-P
JP
NORDITA, Roslagstullsbacken 21, 106 91 Stockholm, Sweden.
Kinnunen
J J
JJ
Törmä
P
P
Pethick
C J
CJ