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Article overview
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Correlations and Pair Formation in a Repulsively Interacting Fermi Gas | | Christian Sanner
; Edward J. Su
; Wujie Huang
; Aviv Keshet
; Jonathon Gillen
; Wolfgang Ketterle
; | | Date: |
9 Aug 2011 | | Abstract: | A degenerate Fermi gas is rapidly quenched into the regime of strong
effective repulsion near a Feshbach resonance. The spin fluctuations are
monitored using speckle imaging and, contrary to several theoretical
predictions, the samples remain in the paramagnetic phase for arbitrarily large
scattering length. Over a wide range of interaction strengths a rapid decay
into bound pairs is observed over times on the order of 10hbar/E_F, preventing
the study of equilibrium phases of strongly repulsive fermions. Our work
suggests that a Fermi gas with strong short-range repulsive interactions does
not undergo a ferromagnetic phase transition. | | Source: | arXiv, 1108.2017 | | Services: | Forum | Review | PDF | Favorites | |
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