Dynamical spin-flip susceptibility for a strongly interacting ultracold Fermi gas
Quantum Gases
2015-05-28 v1
Abstract
The Stoner model predicts that a two-component Fermi gas at increasing repulsive interactions undergoes a ferromagnetic transition. Using the random-phase approximation we study the dynamical properties of the interacting Fermi gas. For an atomic Fermi gas under harmonic confinement we show that the transverse (spin-flip) dynamical susceptibility displays a clear signature of the ferromagnetic phase in a magnon peak emerging from the Stoner particle-hole continuum. The dynamical spin susceptibilities could be experimentally explored via spin-dependent Bragg spectroscopy.
Keywords
Cite
@article{arxiv.1105.5997,
title = {Dynamical spin-flip susceptibility for a strongly interacting ultracold Fermi gas},
author = {Matteo Sandri and Anna Minguzzi and Flavio Toigo},
journal= {arXiv preprint arXiv:1105.5997},
year = {2015}
}
Comments
4 pages, 3 figures