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Palestini F, Pieri P, Strinati GC. Density and spin response of a strongly interacting Fermi gas in the attractive and quasirepulsive regime. Phys Rev Lett. 2012;108(8):080401doi: 10.1103/PhysRevLett.108.080401.
Palestini, F., Pieri, P., & Strinati, G. C. (2012). Density and spin response of a strongly interacting Fermi gas in the attractive and quasirepulsive regime. Physical review letters, 108(8), 080401. https://doi.org/10.1103/PhysRevLett.108.080401
Palestini, F, et al. "Density and spin response of a strongly interacting Fermi gas in the attractive and quasirepulsive regime." Physical review letters vol. 108,8 (2012): 080401. doi: https://doi.org/10.1103/PhysRevLett.108.080401
Palestini F, Pieri P, Strinati GC. Density and spin response of a strongly interacting Fermi gas in the attractive and quasirepulsive regime. Phys Rev Lett. 2012 Feb 24;108(8):080401. doi: 10.1103/PhysRevLett.108.080401. Epub 2012 Feb 23. PMID: 22463501.
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Phys Rev Lett. 2012 Feb 24;108(8):080401. doi: 10.1103/PhysRevLett.108.080401. Epub 2012 Feb 23.

Density and spin response of a strongly interacting Fermi gas in the attractive and quasirepulsive regime.

Physical review letters

F Palestini, P Pieri, G C Strinati

Affiliations

  1. Physics Division, School of Science and Technology, University of Camerino, I-62032 Camerino (MC), Italy.

PMID: 22463501 DOI: 10.1103/PhysRevLett.108.080401

Abstract

Recent experimental advances in ultracold Fermi gases allow for exploring response functions under different dynamical conditions. In particular, the issue of obtaining a "quasirepulsive" regime starting from a Fermi gas with an attractive interparticle interaction while avoiding the formation of the two-body bound state is currently debated. Here, we provide a calculation of the density and spin response for a wide range of temperature and coupling both in the attractive and quasirepulsive regime, whereby the system is assumed to evolve nonadiabatically toward the "upper branch" of the Fermi gas. A comparison is made with the available experimental data for these two quantities.

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