2017/04/30 by Shao-Jian Jiang, Fei Zhou
Mathematics · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Mathematics #Physics #Quantum many-body systems #Quantum, superfluid, helium dynamics #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.97.063606
published as Phys. Rev. A 97, 063606 (2018) · Figs and technical details have been added; more comments on the breakdown of the mean-field theory and on the validity of our analyses have been added
arxiv created 2018/03/23 · openalex created_date 2018/04/13 · openalex publication_date 2018/06/11 · arxiv updated 2018/06/20 · openalex updated_date 2026/08/05
We study the stability of p-wave superfluidity against quantum fluctuations in two-dimensional Fermi gases near a p-wave Feshbach resonance. An analysis is carried out in the limit when the interchannel coupling is strong. By investigating the effective potential of the pairing field via the standard loop expansion, we show that a homogeneous p-wave pairing state becomes unstable when two-loop quantum fluctuations are taken into account. This is in contrast to the previously predicted p+ip superfluid in the weak-coupling limit [V. Gurarie et al., Phys. Rev. Lett. 94, 230403 (2005)]. It implies a possible onset of instability at certain intermediate interchannel coupling strength. Alternatively, the instability can also be driven by lowering the particle density. At the end, we discuss the validity of our analysis.