Abstract
We investigate pseudogap phenomena in an ultracold Fermi gas with a p-wave tunable pairing interaction. Including p-wave pairing fluctuations within a strong-coupling T-matrix theory, we calculate the single-particle density of states (DOS) above the superfluid transition temperature Tc. Starting from the weak-coupling regime, we show that, at first, a dip structure gradually appears to become remarkable in DOS with increasing the strength of the p-wave pairing interaction at Tc. However, this pseudogap structure again becomes less remarkable to eventually disappear, as one passes through the intermediate coupling regime to enter the strong-coupling region. This non-monotonic interaction dependence of the pseudogap is quite different from the s-wave case, where the pseudogap size simply increases with increasing a s-wave interaction strength. This difference is found to originate from the momentum dependence of the p-wave interaction. We also determine the pseudogap temperature below which the dip structure in DOS appears and identify the pseudogap regime in the phase diagram of a Fermi gas with respect to the temperature and p-wave interaction strength.
Original language | English |
---|---|
Article number | 012021 |
Journal | Journal of Physics: Conference Series |
Volume | 400 |
Issue number | PART 1 |
DOIs | |
Publication status | Published - 2012 |
Externally published | Yes |
Event | 26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China Duration: 2011 Aug 10 → 2011 Aug 17 |
ASJC Scopus subject areas
- Physics and Astronomy(all)