Speckle Imaging of Spin Fluctuations in a Strongly Interacting Fermi Gas
Journal Article
·
· Physical Review Letters
- MIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, and Department of Physics, Massachusetts Institute of Technology, Cambridge Massachusetts 02139 (United States)
Spin fluctuations and density fluctuations are studied for a two-component gas of strongly interacting fermions along the Bose-Einstein condensate-BCS crossover. This is done by in situ imaging of dispersive speckle patterns. Compressibility and magnetic susceptibility are determined from the measured fluctuations. This new sensitive method easily resolves a tenfold suppression of spin fluctuations below shot noise due to pairing, and can be applied to novel magnetic phases in optical lattices.
- OSTI ID:
- 21532219
- Journal Information:
- Physical Review Letters, Vol. 106, Issue 1; Other Information: DOI: 10.1103/PhysRevLett.106.010402; (c) 2011 American Institute of Physics; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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