Itinerant ferromagnetism in 1D two-component Fermi gases

Yuzhu Jiang 1 D. V. Kurlov 2 Xi-Wen Guan 1, 3 F. Schreck 2 G. V. Shlyapnikov 4, 1, 2, 5

Physical Review A, American Physical Society, 2016, 94, pp.011601

We study a one-dimensional two-component atomic Fermi gas with an infinite intercomponent contact repulsion. It is found that adding an attractive resonant odd-wave interaction breaking the rotational symmetry one can make the ground state ferromagnetic. A promising system for the observation of this itinerant ferromagnetic state is a 1D gas of $^{40}$K atoms, where 3D $s$-wave and $p$-wave Feshbach resonances are very close to each other and the 1D confinement significantly reduces the inelastic decay.

  • 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071 China
  • 2. VAN DER WAALS-ZEEMAN INSTITUTE - University of Amsterdam Van der Waals-Zeeman Institute
  • 3. Department of Physics, Australian National University
  • 4. LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques
  • 5. Russian Quantum Center