Itinerant Ferromagnetism in Ultracold Fermi Gases

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Itinerant ferromagnetism in cold Fermi gases with repulsive interactions is studied applying the Jastrow-Slater approximation generalized to finite polarization and temperature. For two components at zero temperature a second order transition is found at akF ≃ 0.90 compatible with QMC.
Thermodynamic functions and observables such as the compressibility and spin susceptibility and the resulting fluctuations in number and spin are calculated. For trapped gases the resulting cloud radii and kinetic energies are calculated and compared to recent experiments. Spin polarized systems
are recommended for effective separation of large ferromagnetic domains. Collective modes are predicted and tri-critical points are calculated for multi-component systems.
Original languageEnglish
JournalPhysical Review A (Atomic, Molecular and Optical Physics)
Publication date2012
Volume83
Issue053635
Number of pages8
ISSN1050-2947
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 11
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