Induced p -Wave Pairing in Bose-Fermi Mixtures

Abstract

Cooper pairing caused by an induced interaction represents a paradigm in our description of fermionic superfluidity. Here, we present a strong coupling theory for the critical temperature of p-wave pairing between spin polarised fermions immersed in a Bose-Einstein condensate. The fermions interact via the exchange of phonons in the condensate, and our self-consistent theory takes into account the full frequency/momentum dependence of the resulting induced interaction. We demonstrate that both retardation and self-energy effects are important for obtaining a reliable value of the critical temperature. Focusing on experimentally relevant systems, we perform a systematic analysis varying the boson-boson and boson-fermion interaction strength as well as their masses, and identify the most suitable system for realising a p-wave superfluid. Our results show that such a superfluid indeed is experimentally within reach using light bosons mixed with heavy fermions. arXiv:1809.04812v1 [cond-mat.quant-gas]

Quantum chromodynamics (QCD)-like phase diagram with Efimov trimers and Cooper pairs in resonantly interacting SU(3) Fermi gases

“…Our analysis does not exclude the possibility of trimer superfluidity due to a possible residual attraction between the trimers [115]. Such a state would be similar to the p-wave superfluidity in a Bose-Fermi mixture [116]. Although we consider a resonant interaction in this paper, the phase diagram would quantitatively change when tuning the scattering length.…”

Attractive polaron formed in doped nonchiral/chiral parabolic system within ladder approximation

“…[36,71], where the anisotropic effective masses distribution takes an important role, and we approximate the dispersion as the parabolic anisotropic one similar to the plasmon-polaron formed by the phosphorene locates on polar substrates [72]. Besides, the p-wave scattering of the polaron system is also been studied in topological superfluid and the weak-coupled BEC recently [73,4]. The attractive polaron as a quasiparticle can be observed experimently through the momentum-resolved photoemission spectroscopy [13].…”

Feshbach Resonances in p -Wave Three-Body Recombination within Fermi-Fermi Mixtures of Open-Shell Li6 and Closed-Shell Green1, Li2, Toh3 et al. 2020Phys. Rev. X521270View full textAdd to dashboardCite

“…Quantum-degenerate mass-imbalanced mixtures [20][21][22] are of interest for several reasons. For instance, they can be used to investigate impurity physics [23][24][25], to study Fermi-Fermi mixtures [26][27][28], and to provide a platform for the simulation of the Kondo effect [29].…”