Correlations and Pair Formation in a Repulsively Interacting Fermi Gas
Name
Sanner-2012-Correlations and Pair Formation in a Repulsively Interacting Fermi Gas.pdf
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Author(s)
Gillen, Jonathon Isaiah
Huang, Wujie
Ketterle, Wolfgang
Keshet, Aviv
Su, Edward Joseph
Sanner, Christian Burkhard
Date Issued
June 2012
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Sanner, Christian et al. “Correlations and Pair Formation in a Repulsively Interacting Fermi Gas.” Physical Review Letters 108.24 (2012): 240404. © 2012 American Physical Society.
Version
Final published version
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 an 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 10ℏ/E[subscript 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
MIT-Harvard Center for Ultracold Atoms
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.108.240404
