Competition between Pairing and Ferromagnetic Instabilities in Ultracold Fermi Gases near Feshbach Resonances
Name
Pekker-2011-Competition between Pairing and Ferromagnetic Instabilities in Ultracold Fermi Gases near Feshbach Resonances.pdf
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Author(s)
Pekker, David
Babadi, Mehrtash
Sensarma, Rajdeep
Zinner, Nikolaj
Pollet, Lode
Zwierlein, Martin Wolfram
Demler, Eugene
Date Issued
February 2011
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Pekker, David et al. “Competition Between Pairing and Ferromagnetic Instabilities in Ultracold Fermi Gases Near Feshbach Resonances.” Physical Review Letters 106.5 (2011) : 050402. © 2011 American Physical Society
Version
Final published version
Abstract
We study the quench dynamics of a two-component ultracold Fermi gas from the weak into the strong interaction regime, where the short time dynamics are governed by the exponential growth rate of unstable collective modes. We obtain an effective interaction that takes into account both Pauli blocking and the energy dependence of the scattering amplitude near a Feshbach resonance. Using this interaction we analyze the competing instabilities towards Stoner ferromagnetism and pairing.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.106.050402
