Parish, MM;
Marchetti, FM;
Lamacraft, A;
Simons, BD;
(2007)
Polarized fermi condensates with unequal masses: Tuning the tricritical point.
PHYS REV LETT
, 98
(16)
, Article 160402. 10.1103/PhysRevLett.98.160402.
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Abstract
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.
| Type: | Article |
|---|---|
| Title: | Polarized fermi condensates with unequal masses: Tuning the tricritical point |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.98.160402 |
| Publisher version: | http://dx.doi.org/© 2007 The American Physical Soc... |
| Language: | English |
| Additional information: | © 2007 The American Physical Society |
| Keywords: | GAS, SUPERCONDUCTIVITY, SUPERFLUIDITY, MOLECULES |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1332993 |
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