Competition Between Pairing and Ferromagnetic Instabilities in Ultracold Fermi Gases Near Feshbach Resonances

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Competition Between Pairing and Ferromagnetic Instabilities in Ultracold Fermi Gases Near Feshbach Resonances

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Title: Competition Between Pairing and Ferromagnetic Instabilities in Ultracold Fermi Gases Near Feshbach Resonances
Author: Pekker, David; Sensarma, Rajdeep; Zinner, Nikolaj; Pollet, Lode; Zwierlein, Martin; Babadi, Mehrtash; Demler, Eugene A.

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Citation: Pekker, David, Mehrtash Babadi, Rajdeep Sensarma, Nikolaj Zinner, Lode Pollet, Martin Zwierlein, and Eugene Demler. 2011. Competition between pairing and ferromagnetic instabilities in ultracold Fermi gases near Feshbach resonances. Physical Review Letters 106: 050402.
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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.
Published Version: doi://10.1103/PhysRevLett.106.050402
Other Sources: http://arxiv.org/abs/1005.2366
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:13421141
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