Itinerant ferromagnetism in 1D two-component Fermi gases - Laboratoire de Physique Théorique et Modèles Statistiques

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

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

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