Spin polarons and molecules in strongly-interacting atomic Fermi gases
Abstract
We examine pairing and molecule formation in strongly-interacting Fermi gases, and we discuss how radio-frequency (RF) spectroscopy can reveal these features. For the balanced case, the emergence of stable molecules in the BEC regime results in a two-peak structure in the RF spectrum with clearly visible medium effects on the low-energy part of the molecular wavefunction. For the highly-imbalanced case, we show the existence of a well-defined quasiparticle (a spin polaron) on both sides of the Feshbach resonance, we evaluate its lifetime, and we illustrate how its energy may be measured by RF spectroscopy.
Cite
@article{arxiv.0805.3667,
title = {Spin polarons and molecules in strongly-interacting atomic Fermi gases},
author = {P. Massignan and G. M. Bruun and H. T. C. Stoof},
journal= {arXiv preprint arXiv:0805.3667},
year = {2014}
}
Comments
4 pages, 5 figures. Revised version accepted for publication: minor changes to Fig. 2 (added inset with the chemical potential at unitarity), to Fig. 3 (experimental data updated), and to the notation