TY  - JOUR
IS  - 16
N1  - © 2007 The American Physical Society
TI  - Polarized fermi condensates with unequal masses: Tuning the tricritical point
AV  - public
Y1  - 2007/04/20/
VL  - 98
JF  - PHYS REV LETT
A1  - Parish, MM
A1  - Marchetti, FM
A1  - Lamacraft, A
A1  - Simons, BD
KW  - GAS
KW  -  SUPERCONDUCTIVITY
KW  -  SUPERFLUIDITY
KW  -  MOLECULES
N2  - We consider a two-component atomic Fermi gas within a mean-field, single-channel model, where both the mass and population of each component are unequal. We show that the tricritical point at zero temperature evolves smoothly from the BEC to BCS side of the resonance as a function of mass ratio r. We find that the interior gap state proposed by Liu and Wilczek is always unstable to phase separation, while the breached pair state with one Fermi surface for the excess fermions exhibits differences in its density of states and pair correlation functions depending on which side of the resonance it lies. Finally, we show that, when r greater than or similar to 3.95, the finite-temperature phase diagram of trapped gases at unitarity becomes topologically distinct from the equal mass system.
ID  - discovery1332993
UR  - http://dx.doi.org/© 2007 The American Physical Society
PB  - AMERICAN PHYSICAL SOC
SN  - 0031-9007
ER  -